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General Surname Sites and Resources

• ABCgenealogy: Surnames: O 
• Ancestor Guide: Surnames Beginning with O 
• AncestralFindings.com - Surnames O 
• Ancestry Connections Surname Registry - OA-OZ , OZ-PG 
• Ancestry.com - Message Boards - Surnames - O 
• Family Workings O Surname Links 
• Find Ancestral Photographs And Family History At Dead Fred - Genealogy Photo Archive - Surnames - O 
  A searchable database with thousands of identified photos and mystery photos.
• Genealogy.com: Family Home Pages - O 
• Genealogy Resources on the Internet - "OA-OD" Surname Mailing Lists , "OE-OH" , "OI-ON" , "OO-OT" , "OU-OZ" 
  Search the index of surname mailing lists below: Surname Mailing Lists.
• GenealogyTODAY.com - Family Albums Index of 'O' Surnames 
  Surnames referenced in the databases, transcriptions and articles hosted at Genealogy Today.
• Google Web Directory .... Genealogy > Surnames > O 
• Higginson Book Company - Surnames OAKS through OWSLEY 
• inGeneas Table of Common Surname Variations and Surname Misspellings - N-Q 
• The Obituary Link Page - Family Obituary Archives Online - O 
• Open Directory - Society: Genealogy: Surnames: O 
• 'O' Surnames at RootsWeb 
• Quintin Publications | Family Genealogies Letter O 
  Family genealogies available on CD or in books.
• The Researchers Hotlist - N to Q 
  Surname listings of family history researchers from all over the world.
• RootsWeb: Genealogy Mailing Lists: `O' Surname Lists 
• Surname Springboard Index - O 
• Surname Websites Beginning with O 
• SurnameWeb Surname Registry - O Index 
• SWINX Zoeklijst Nederlandse Familienamen / SWINX Searchlist Dutch Surnames - O 
• Websites at RootsWeb: O Surnames 

Surname Specific Sites and Resources

• OAKES Genealogy 
  Descendants of John OAKES born 1771, died 12-11-1848, Waterville, Lamoille Co., Vermont.
• OATMAN Links Information Page 
  Monthly e-mail newsletter for the OATMAN surname, edited by Larry L. Oatman. Past issues archived on this site.
• The O'BEIRNE Family Journal 
  A family web site for BEIRNE's and O'BEIRNE far and wide. If you have an article about BEIRNE's this is the site you need.
• Descendants of Captain John OBLENIS 
  The family of The United Empire Loyalist Captain John OBLENIS, BLENIS, OBLENES, of New Brunswick, Canada.
• The O'BRIEN Clan  
  O'Brien family genealogy including O'BRIEN, WILLIAMSON. Hundreds of links and lots of Irish and O'Brien information.
• O'BRIEN Clan Australia Victoria 
  Database of 22,000 births, deaths and marriages of O'BRIEN, O'BRIAN, O'BRYAN, BYRNE, BRIAN, BRIEN, BREEN and other variants of the name O'Brien, for the State of Victoria, Australia, 1830 - 1950.
• O'BRIEN's Genealogy Homepage 
• Welcome to the OCENASEK family tree site 
  Genealogy site for the following surnames: OCENASEK, OTCENASEK, OCENAS, OTCENAS, OCHENASEK etc. all around the world.
• O'COBHTHAIGH HomePage 
  COUHIG, COHIG, COWHIG, COHICK, COWHICK, COUIG, COWHAGG, COHEIG, COUIC and other spellings of the Irish O'COBHTHAIGH name.
• O’CONCHOBHAIR, O'CONNOR, CONNER & CONNOR DNA Project 
  Open to any male O'Connor, Connor(s), O'Conner or Conner(s) or man believing that he is descended from a one of these surnames. Participants are sought from all parts of the USA, Canada, Europe, Latin America and anywhere else these surnames may be found. Looking specifically for participants from the British Isles, which is believed to be the source of the names and original ancestors.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  O'CONNOR Family Website 
  Information about Peter O'CONNOR and his descendants from Ireland to Canada.
• Dingle O'CONNOR Ancestors 
• O'DEA Online 
  Home Page of the Dysert O'DEA Clan Association, for those with surnames O'DEA, O'DAY, DAY, DEA and DEE. Includes history of the O'DEA Clan, names of current Clan Association officers and application for membership, genealogical exchange, Griffith's database of Clan surnames, and details on the Fifth International O'DEA Clan Gathering in July 2002.
• ODEA home page 
  Home Page of Clan UA DŠAGHAIDH for all those with surnames O'Dea, O'Day, Dee, or Day.
• ODELL/ODLE Family 
  Descendants of THOMAS ODELL and SARAH (RIDGELY) BREWER of Maryland, Ohio, and Indiana.
• ODELLs: Lost & Found 
  ODELL, O'DELL, ODLE.
• ODELLs - The World's Greatest 
  ODELL and its variants - O'DELL, OADDLE, ODLE, OADLE, ODILL, WODLE, WODHULL, WODELL, WOODELL.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  O'DELL Surname Research Website 
  Website devoted to researching the name O'DELL and related surnames.
• The Chronicles of the O'DEMPSEY Family 
  The O'DEMPSEY family From Rathcannon, County Tipperary, Ireland to Upper Freestone, Queensland, Australia.
• Our Family The ODENDAHLs 
  Peter, Wilhelm and E. ODENDAHL immigrated from Germany to Illinois in 1853. View photos, descendant list and surnames.
• Genealogy ODIJK, VAN ODIJCK, VAN OIJCK 
  Odijk, Franken, Oostrum, Van Der Kooij, Swanenburg, Benthem, Korpershoek, Van Geland, Vriens, Mackdaniel.
• O'DOCHARTAIGH Clan Organisation 
  News and information on the International clan based in Buncrana Ireland, Inishowen peninsula. The largest genealogy database in Europe is housed at our Heritage Center in Buncrana and will soon be available online.
• Ó DOCHARTAIGH (DOHERTY) Clan of Ireland 
  Over 140 names are derived from O'DOCHARTAIGH (with or without the 'O'): DARITY, DAUGHERTY, DOCHARTAIGH, DOCHERTY, DOGHERTY, DOHERTY, DORITY, DOUGHERTY, etc.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  The (Ruari) O'DOHERTY Family 
  Family from the Illies in Inishowen.
• ODOM Genealogy, Greenville Co., S.C. 
  Related families in Greenville Co., S.C. ODOM, ODAM, CANNADA, TAYLOR, BROWN, LOFTIS, ROBERTS, MARTIN, DILL, MOON, HOWELL and many more.
• O'DONNELLs in Carna Parish, Co. Galway, Ireland 
  Descendants of Bartley and Anne (Ridge) O'DONNELL of Rusheenamangh, Co. Galway, Ireland. Includes extractions of O'DONNELL marriages and baptisms from Carna parish registers.
• The O'DONOGHUE Society 
  We are a community of like-minded individuals, from all over the world, interested in the history and genealogy of our families and the surname O'DONOGHUE itself, which has changed in many ways from the Gaelic Irish DONNCHADHA.
• O'DONOVAN 
  DONOVAN/O'DONOVAN - A history of the clan. Genealogy of the family in London/Clonakilty & Bantry.
• The DRISCOLLs of Canada 
  A website to unite the Canadian DRISCOLLS, O'DRISCOLLS, and DRISKILLS into a branch of the O'DRISCOLL Clan of Baltimore, Ireland.
• OELKEs Around Cook County, IL 
  A genealogy page for the surname OELKE in and around Cook County, Illinois.
• The OFFEN Family 
  OFFEN family worldwide.
• OFFICER Surname Census Extracts 
  Attempts to transcribe ALL occurrences of the OFFICER surname in the US and state census records.
• OFFLEY Family Society 
• OFFRINGA Familytree with more than 3,000 Offringa's 
  From Dick OFFRINGA in Emmeloord, Netherlands.
• Clann O'GALLCHOBHAIR (GALLAGHER) World-Wide 
  The "virtual Tir Chonnaill" of the ancient Irish clann O'GLLCHOBHAIR, including GALLAGHER, GALLAHER, GOLLAHER, GOLLIHER, GALLAHUE, etc.
• OGASAWARA Clan Genealogy 
  Genealogical information of the descendants of Ogasawara Jiro Nagakiyo (1163- 1242) who descended from the 56th Japanese emperor, Emperor Seiwa (849 - 880).
• OGBOURNE Chronicles 
  Historical & Genealogical Information relating to the names of OGBOURNE, OGBORNE, OGBORN, OGBURN.
• The African American OGBURNs And The House of OGBURNs 
• The OGLE / OGLES Family Association 
  This not-for-profit organization is dedicated to the preservation of the history and genealogy of the Ogle and Ogles families in North America.
• O'HARA Family 
  Family members of Christopher O'HARA, born in Ireland around 1801, lived in Middlesex until 1830, after which he was transported to Australia on the Florentia. He had a family in London and later another in the Patrick Plains area in New South Wales.
• O'HARA Family 
  Hugh O'HARA of Pennsylvania to Allen County, Indiana.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  The O'HARA Family Genealogy Page 
  Darby, Dittman/N, Kleiman, Leonard, Menchen, Miller, O'Hara, Rigney, Speaker, Sullivan.
• OHLINGER / OLINGER Family 
• OHMER Family Genealogy 
  OHMER surname worldwide.
• OHNMEISS Genealogy 
  OHNMEISS, OHNMEIS, OHMNIES, OHMNEIS, OHNMICE.
• O'KEEFFE Home Page 
• OKEY Family Genealogy 
  ALTON, DALLAS, FORTUNE, HOLMES, HOSMER, JOHNSON, KINNEY, MACARTHUR, OKEY, THORPE.
• Die OLDEWURTEL in Ostfries 
  Genealogy of the OLDEWURTELS from Ostfriesland and much more about folks and customs in our country on the coast of the North Sea.
• Our Family Genealogy Pages: OLDHAM Families 
  OLDHAM Family One Name Study Site includes notes, photos, maps, documents. Many search options.
• OLIN Family Society 
  Descendants of John OLIN and Susannah SPENCER.
• OLIVE Family Branches Genealogy 
  Descendants of William OLIVE.
• OLIVE Genealogy 
• OLIVER Home Page 
  Descendants of Althea Bennett and John James OLIVER from Muskoka, Ontario, Canada to Lone Rock, Saskatchewan and now in western Canadian provinces. Homesteading photos, land grants and birth certificates. BENNETT, RUTTAN, WILSON, CUMMING, BLAIR.
• OLIVER Surname Mailing List 
• My OLIVER Family 
  Family research for Enoch, Arthur and Charles Oliver who lived in Pittston, Berwick PA and Essex county NJ.
• OLLIFF Family History 
  Over 6,000 descendants of John Shears OLLIFF of Bulloch County, Georgia (90% with this surname spelling are descendants of this line.
• OLLIFFE One Name Study 
• OLLIFFEs from England, Ireland and Oshawa 
  OLLIFFE family history in Oshawa, Ontario, Canada and their beginnings in England and Ireland. Download pictures and documents.
• The Boston OLLIS Family Home Page 
  For descendants of Boston Ollis, born abt. 1743 in Wales, died March 9, 1835, buried in Morgan County, TN.
• OLLIS - OLLIS Genealogy 
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  OLLIVETTE, OLIVET, OLLIVETTE, deOLLIVETT 
• The Descendants of Thomas OLNEY of Providence, Rhode Island 
  Thomas OLNEY, one of the original thirteen plantation owners of Providence, Rhode Island. Many Rhode Island families are represented.
• The O'MAHONY Society 
• O'MALLEY Family in Australia - The Descendants of John MALAY 
  MALAY, MALEY, MALLEY, O'MALLEY family of Westbury Tasmania, Australia.
• The Official Website of the O'MALLEY Clan Association 
• O'MARY Genealogy Homepage 
• The OMASTA Pages 
  Pages dedicated to the Omasta family worldwide.
• OMOND 
  OMOND family tree connected to ROONEY.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  O'MORE: Irish MOORE Family History 
  MOORE family of Irish origin - O'MORE, O'MORDHA. Descended from Conal Cearnach, Raudhri Mo/r, and Ollam Fodhla they are a Clanna Rory family.
• The O'NEAL Genealogy Association Web Site 
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  Josiah O'NEAL Will 
  Last Will and Testament of Josiah O'NEAL written March 29, 1852.
• Descendants of Joseph O'NEALE 
  I am researching the O'NEAL/O'NEILL/O'NEALE Family from Calvert/St. Mary's Co, Md and Bedford County Pa.
• The O'NEILLS of County Cork 
  The O'NEILLS of County Cork is the history of four O'NEILL families of East Cork, Ireland, from 1666 to 1998. It includes the O'NEILLS of Conna, Ballydaniel, Ballymacoda, Garryvoe, Imokilly, Warren and Monagurra in East Cork, Ireland and Newfoundland, Canada. The allied surnames are MAHONY, BRUNNOCK, CROWLEY, GLEESON, FITZGERALD, CUNNINGHAM, POWER, O'SULLIVAN, FOUHY, KENNEFICK, among many others.
• OOSTERHEEM 
  Historical & Genealogical Research relating to the names (Van)OOSTRUM, OOSTROM, OOSTEROM, OOSTERUM, OOSTROOM, OOSTEROOM, OOSTROOM, OOSTSTROOM, etc., originated from The Netherlands.
• OP DEN GRAEF / UPDEGRAFF Family 
• The Descendants of William OPENSHAW 
• OPP Genealogy 
• Descendants of Richard ORAM 
  ORAM families of Wiltshire, England.
• ORANGE Family Genealogy & Links 
  Descendants of Louis ORANGE. SHARROCK, BYRD, TUNE, EUBANK, MERRIMAN, STEPHENS.
• The ORANGES Family - California 
  " With the advent of The Internet we have been in contact with many Oranges from all over the world. Dino Oranges, Sr. & family from New York, Alfredo Oranges from Panama, & a group from Sao Paulo, Brazil. As additional information comes in we will keep you posted! ".
• ORAVECZ Families Web Site 
  General site for all Oravecz families. Currently includes descendants of George Oravecz, Sr. and Miller and Partsch ancestors of Miriam Jane Partsch Oravecz. Hosting: Oravecz, Oravec, Oravetz, Oravets, Oravez, Oravis, and Orawetz.
• The ORBAN's 
  Belgium, Hungary. History, etymology and genealogy of the Orban's around the world.
• ORDEMANN und ORDEMAN weltweit - eine genealogische Homepage 
  Genealogical Homepage of the ORDEMANN and ORDEMAN families which have their roots in the Oldenburg county of Germany, West of Bremen. Most of their descendants can now be found in Germany, other European countries, and Northern America.
• Clan O'REAGAN - Clan na Ua Ríagáin 
  Official website for the Clan REAGAN of Ireland.
• O'REILLY/RILEY Family 
  Descendants of Barnabas O'REILLY and Anna Marie FERREE of south central Pennsylvania.
• ORGAN Family Research and Genealogy Site 
• ORLANDO One Name Study 
  Guild of One Name Study registered. Study commenced February 2002.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  ORMAN Family Reunion 
  The ORMAN family reunion August 11, 2001 in Ottumwa, Iowa for the descendants of David Orman, Sr. 1800 - 1888.
• ORMAN Surname Resource Site 
  Online documents, message board and links to aid all researchers for Orman surname.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  ORMESNIL Family History 
  ORMESNIL families of Quebec.
• ORMOND, ORMAND, ORMAN Family 
  ORMOND, ORMON, ORMAND, ORMAN from North Carolina.
• The *RNER Genealogy Project 
  The website consists of four interconnected one name studies: ARNER, ORNER, ERNER, & URNER families in America.
• O'ROURKE Families and Connections 
• O'ROURKE Genealogy and History 
  A central site for connecting researchers of the O'RUAIRC Clan, including the families of O'RORKE, O'ROURKE, O'ROARKE, O'ROURK, ROARKE, RORKE, ROURKE, RUARK, ROARK, ROURK, etc.
• OROZCO Family 
• The James "Whistling" ORR Family of Mecklenburg County, North Carolina 
  Descendants of James ORR.
• ORR Genealogy 
  John R. ORR Jr. genealogy.
• ORRELL Family Association 
  ORRELL, ORRILL, ORREL, OREL, ORELL, ORRELS, ORILL, etc.
• ORTH Family History 
  Johann Peter ORTH, born in Furstengrund, Hessen, Germany, in 1818 and died in Wallace Township, Perth County, Ontario, Canada, in 1893.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  La Coterie OSTIGUY 
  An international OSTIGUY family society.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  The ELLIS-OSBORN Home Page 
  Thomas Jefferson OSBORN and Elizabeth A. ELLIS families in the mid Ohio area. ELLIS-OSBORN Quarterly Newsletter.
• OSBORNE Origins 
  Dissemination of OSBORN(E) genealogical information and coordination of research on OSBORNE family history.
• O'SHEA Clan Homepage 
  O'Shea Clan Society set up to help O'Sheas and variant surnames with their family history. There is also an O'Shea yDNA Project.
• The OSTERHOLM Genealogy 
• The OSTLE Family History Net - Welcome 
  History of the OSTLE/OSTELL family of Cumberland, England. Also includes general information on Holm Cultram parish and its Quaker community, with index of the early Quaker families of Cumberland.
• OSTRANDER KELLEY Family Page 
  Descendants of Pieter OSTRANDER who married Rebecca Traphagen in 1679 in New Amsterdam.
• Clan O'TOOLE Web Site 
• O*T*RIDGE Genealogy 
  Website for a One-name Study of the O*T*RIDGE family, including OTRIDGE, OATRIDGE, OTTRIDGE and related variations (but not OUTRIDGE).
• OTTworld 
• Dr. Bodo OTTO Association 
• Família OTTOBONI 
• Storia della famiglia OTTOBONI 
  Storia della Famiglia papale e principesca romana degli OTTOBONI DUCHI DI FIANO, dal XIII° sec. fino al suo attuale rappresentante Marchese Don Domenico Serlupi Crescenzi Ottoboni, cavaliere d'onore e devozione del Sovrano Militare Ordine di Malta, vice cancelliere dell'Ordine di Santo Stefano P. e M. e dell'Ordine di S. Giuseppe, gran croce dell'Ordine Costantiniano di S. Giorgio.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  Le HOUYMET Internet - Home on the Internet of Les Descendants de Jean OUIMET, Inc. 
  OUIMET, HOUYMET, VILMET, WEMET, WEMETT, WUILLEMETTE, WILMOT and numerous other spelling variations.
• The OULTON Project 
  An attempt to trace the Oultons back to the Irish-Norse Vikings who settled in Cheshire England. Also includes most all Oulton genealogy in America.
• OUTTEN Family History 
  Descendants of John OUTTEN of Somerset County, Maryland.
• The OVERCAST Family Website 
  Dedicated to the OVERCAST surname. Descendants of George Overcast, born 1789 in North Carolina; William Smith Overcast, born May 05, 1824 in North Carolina; John Morrison Overcast, born December 8, 1856 in Alabama.
• OVERDORF Family Records Index 
  Census transcriptions and obituaries concerning the OVERDORF surname.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  OVERMYER Historicals 
  Publishings on local & military history including the book, Forest Haven Soldiers: The Civil War Veterans of Sleeping Bear & Surrounding Leelanau. Also OVERMYER family genealogy, conservation, Quixtar client site. OBERMAYER, OBERMEYER, OVERMIRE Ohio and Pennsylvania histories. Hunting and Grand Traverse Michigan area links.
• OVERMYER History  
  Exploring the family history from 1300s to 1700s & beyond. OBERMAYER/ OBERMEYER/ OVERMIRE/ OVERMOYER/ OVERMEYER/ OVERMIER/ & variants.
• OWEN/OWINGS SAGA 
  Descendants of Henry OWINGS, born 1690 MD.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  OWENS/OWEN Family Genealogical Database 
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  OWENS Genealogy 
  Descendants of John OWENS I from Northeastern North Carolina.
• Welcome to John OWENS I Family & Friends 
  Descendants of John OWENS I primarily in North Carolina.
• OWSLEY Family Historical Society 
  OWSLEY, OUSLEY, OUSELEY, HOUSLEY, HOWSLEY.
• The OWSLEY Tidepool 
  Ousley, Owsley, Howsley, Housley, Oisle.
• The OXBROWs of Bocking & Braintree 
  Essex, England.
• [The original link is broken. This link points to an archived copy on the Wayback Machine]
  OXFORDs of America 
• OXFORDs of the World 
• Descendants of Joseph OXLEY and Moira ( ) 
  British Isles and USA. CLARKE, EICHHORN, HARRIS, HATCHER, OXLEY, SPRUKS, WELCH. Some photographs.

Surname Mailing Lists

Each of the surname mailing list links below point to the Genealogy Resources on the Internet site, wonderfully maintained by John Fuller. On behalf of everyone in the genealogical community, John keeps track of all genealogy-related mailing lists, including how to subscribe, a brief description with the purpose of the list and the name of the person who maintains the list. Thank you, John!

• "OA-OD" Surname Mailing Lists 
  OADES (includes Oads, Odes, Oad), OAG (includes Oal, Ogg, Hogg, Hoag), OAK, OAKDEN, OAKES, OAKEY (includes Oaky, Oak), OAKFORD, OAKLEY, OAKLEY, OAKS, OARD (includes Ord, Aard, Oward), OARS, OATES, OATRIDGE (includes Otridge, Ottridge, Oateridge), OATS, OATSVALL, OBANNON (includes O'Banion, O'Bannion, O'Banyan), OBBARD (includes Obbards, Obard), OBER, OBERG, OBERHARDT, OBERHOLTZER, OBERLE, OBERLIN, OBERMAN, OBERPAUR (includes Oberpauer), OBERST, OBERT, OBERTEAN, OBERTEIN, OBIN, OBNEY, OBOYLE, OBRADEN, OBRE, OBRIAN, OBRIANT, OBRIEN (includes Byrom, Bynum, Byran, Biron, Brian), OBRIEN (includes O'Briain, O'Brian, O'Briant, O'Breen, O'Bryen, O'Bryon, O'Bryan, O'Bryant, Bryan, Bryant, Bryen, Brian, Brien, Briend, Briens, Brine, Brion, MacBrien, MacBryen, McBrian, McBrien, McBryen), OBRYAN, OBRYANT, OBYRNE, OCALLAGHAN, OCHOA (includes Otsoa, Otxoa), OCHS, OCLEARY (includes O'Cleery, Clery, Cleery, Cleary, Claree, Clarey, Cleare, Clearey, Clary, McCleery, McCleary, McClary, MacCleary, MacCleery), OCONNELL (includes O'Connell, Connell, Conel, Connelly, Connall, O'Conail), OCONNER, OCONNOR (includes O'Conner, Connor, Conner, O'Conor), OCONNOR (County Tipperary, Ireland; includes O'Connor, Connors, Conner, Connor), ODAM, ODANIEL (includes O'Daniel, Daniel, Daniell), ODAY, ODD, ODDBOY (includes Odd, Oddy, Oddie), ODDEY (includes Oddie, Oddy), ODDIE (includes Oddey, Oddy), ODDING, ODDY, ODEA, ODELL (includes Odel, Odle, O'Dell, O'Del), ODELL (United Kingdom; includes O'Dell, Odle, Oadell), ODEN, ODENBAUGH (includes Odenbach, Offenbach, Adenbach, Adenbaugh, Von Adenbach), ODER, ODETTE (includes Audet, Audet dit Lapoint), ODGERS, ODLE, ODO, ODOM, ODONNELL (includes Odonell, O'Donnel), ODONOGHUE, ODONOVAN, ODOR (includes Oder), ODOWD, ODUM, ODWYER.

• "OE-OH" Surname Mailing Lists 
  OEHLER, OEHME, OEHMIG, OEHRING, OELTJENBRUNS, OEN, OERTLING, OESTERREICH, OESTREICH, OFER, OFF, OFFENBACKER, OFFICER, OFFLEY, OFFUTT, OFLAHERTY, OGAN, OGARA (includes O'Gara, O'Hara, Ohara), OGBORN (includes Ogborne), OGBURN, OGDEN, OGG, OGILVIE, OGILVIE (Scotland), OGLE, OGLENCKI (includes Oglinsky), OGLESBY, OGLETHORPE, OGLETREE, OGLEY, OGRADY, OHALLORAN, OHANAIN, OHANLON, OHANNAIN, OHANNAN, OHANNEEN, OHANNEN, OHANNON, OHARA (includes O'Hara), OHARA, OHARE, OHAVER, OHEARN, OHL, OHLINGER, OHLWEIN (includes Ohlwine, Oldwine), OHMANN, OHNMACHT (includes Ohmacht, Ohngemach).

• "OI-ON" Surname Mailing Lists 
  OKEEFE, OKEEFFE, OKELLEY, OKELLY, OKESON (includes Okerson), OKEY, OKEY (Cambridge, England; includes Oakey, Oke, Okee), OKRESZ (includes Okrez), OLD, OLDAKER, OLDALE (includes Oldall, Oldehall), OLDEN, OLDFATHER, OLDFIELD, OLDHAM, OLDHAM, OLDING, OLDLAND, OLDS (includes Old, Auld, Aulds), OLEARY (includes Leary, O'leary), OLEFORD, OLEJNICZAK, OLENSKI, OLER (includes Ohler, Oller, Ollar, Oylar), OLESEN, OLESON, OLINGER, OLINSKI, OLIPHANT, OLIPHANT (Scotland), OLIVE, OLIVEIRA, OLIVER, OLIVERIO (includes Aliverio, Ahliverio, Ohliverio, Olahverio), OLIVIER, OLLER, OLLERTON, OLLIS, OLMSTEAD, OLMSTED (includes Olmstead, Almstead, Omsted, Omstead), OLNEY, OLOUGHLIN, OLSCHWANGER (includes Olsvanger, Olswang, Alschwanger, Alsvanger, Alswang), OLSDOTTER, OLSEN (includes Olson), OLSEN, OLSON, OLSSON, OLSZEWSKI, OMALLEY, OMAN, OMARA, OMARY (includes O'Mary), OMEARA (includes O'mara, Mara, Meara), OMEARA, ONEAL, ONEAL (O'Neal Genealogy Association), ONEALL (includes O'Neill, O'Neal, O'Neil, Neal, Neale), ONEIL, ONEILL, ONESTO (Italy), ONEY, ONGARO, ONION, ONKEN, ONLEY, ONORI, ONSTINE, ONSTOTT (includes Anstadt, Onstatt, Anstott), ONLY, ONWELLER.

• "OO-OT" Surname Mailing Lists 
  OOSTMYER, OOSZWSKI, OOTEN (includes Euten, Ooton), OPATOWSKI, OPDENGRAEFF (includes UpdeGrave, OpDeGraff, UpdeGrove), OPDYCK (includes Updike, Op den Dyck, Opdycke), OPENSHAW, OPFER, OPGENORTH, OPHER (includes Ofer, Offer, Opherr), OPIE (includes Oppy, Oppey, Opee, Oppe), OPP, OPPERMAN (includes Oppermann), O'QUINN (includes O'Quin, Quin, Quinn, O'Quain, O'Guinn), ORAHOOD (includes Arahood, Arihood, Arrohood, Orchard, Orihood, Orrhood, Orrihud), ORAM, ORANGE, ORBAN, ORBAN, ORBITS, ORCHARD, ORCHIN (includes Archin, Allchin), ORCHOLSKI, ORCUTT, ORDWAY, OREAR (includes O'Rear, ORear, Orrear, Orea), OREGAN, OREILLY, OREM (includes Oram, Orum), ORFF, ORFORD, ORGAN, ORGEL, ORIANS (includes Oreans, Arians, Arrians), ORLANDI, ORLANDO (includes Orlanda, Orlande), ORLOWSKI (includes Orlaska, Orlawske, Orloske, Orloski, Orlowska, Orlowsky, Orlovsky, Orlovski), ORMAN, ORME, ORMEROD, ORMISTON, ORMOND, ORMSBY, ORMSTON (includes Ormiston, Ormsby), ORNDORFF, ORNELAS, ORNER (includes Aurner, Auner), OROONEY (includes Rooney, Roony, Roonay, Roney, Rowney), OROURKE, ORPHEY, ORPWOOD (includes Arpwood, Arpod), ORR, ORRELLS, ORRICK, ORRISON (includes Orison), ORSBORNE, ORSER, ORTEGA, ORTEGO, ORTES (includes Ortis), ORTH, ORTHOFER, ORTISI, ORTIZ, ORTON, ORUM (includes Oram, Orem), OSBORN (includes Osborne, Osbourn, Osbourne, Osburn), OSBORNE, OSBORNE (United Kingdom; includes Osborn, Osbourne, Osbourn), OSBOURNE, OSBURN, OSGOOD, OSHAUGHNESSY, OSHEA, OSHEAL (includes Oshiel, Oshields), OSHIELDS, OSINCUP (includes Osencup, Ossencup), OSMAN, OSMOND, OSMOND (includes Osmund), OSMUN (includes Osman, Osmin, Osmond, Ozmun), OSTEEN, OSTENDARP, OSTER, OSTERBERG (includes Osterburg, Ostberg), OSTERTAG (includes Osterstag, Osterstock, Osterstok, Ostertock, Osterstack), OSTHEIMER, OSTOJSKI, OSTRANDER (includes Oostrander, Hostrander, Van Ostrander, Van Nostrunt, Vanostran, Ostervanter, Ostrancer, Ostronden, Ostrandt, Osslander, Osatrander, Noortstrande), OSTROM (includes Ostrum, Oosteroom), OSTROWSKI, OSTRY, OSTRYE (includes Ostrowicki), OSULLIVAN, OSWALD, OSWALT, OTEY (includes Otee, Otie), OTIS, OTLEY (includes Ottley, Otly, Ottly), OTOOLE, OTOSKI, OTT, OTTE, OTTEN, OTTERBOURG, OTTERSON, OTTERSTEDDE (includes Otterstede, Otterstad), OTTERSTEDT (includes Otterstett, Otterstatt), OTTERY, OTTEY, OTTI, OTTINGER, OTTO, OTTY, OTWELL.

• "OU-OZ" Surname Mailing Lists 
  OUCHI, OUDERKIRK, OUELLET, OUELLETTE, OUIMET (includes Houymet, Oumet, Ouimet, Ouimett, Ouimette, Wemet, Wemett), OULTON, OURADNIK, OUTHOUSE, OUTLAND, OUTLAW, OUTMAN, OUTRAM (includes Owtrim, Outtrim), OUTRED, OUTWATER (includes Outwaters), OUTZEN (includes Outsen), OUZTS, OVENDEN, OVERACKER (includes Overocker, Overacre, Oberacher), OVERALL (includes Overhall), OVERBAUGH (includes Oberbach), OVERBY, OVEREND, OVERGAARD (includes Overgard), OVERHOLT, OVERIN (includes Overing), OVERLIN (includes Overlan, Oberlin, Oberlan, Overland), OVERLOCK (includes Overlook, Oberlock, Oberloch, Overlack, Oberlack, Ueberloch), OVERMAN, OVERMYER (includes Obermayer, Overmayer, Overmeyer, Overmier, Overmeir), OVERMYER (includes Obermire, Obermeyer, Overmire, Overmoyer, Overmeyer, Overmier), OVERSHINER, OVERSTREET, OVERTON, OVERTURF, OVIATT, OVINGTON, OWEN (includes Owens, Oen, Owing), OWEN, OWENS, OWINGS, OWLE, OWNBY, OWSLEY, OXFORD, OXFORD, OXLEY, OYERVIDES (includes Ollervires, Ollerbiras, Ollervide), OYLER, OZIER, OZMENT (includes Osment).

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