One-Name Genealogical Study on the surname Shillabeer and variants which include Shillibeer, Shellabear(e), Shillaber and Shillibier. [The original link is broken. This link points to an archived copy on the Wayback Machine]
This database contains a listing of Shurrock families (and closely related names such as Sherrock, Sharrock, Sherrug) that originated in the counties of Buckinghamshire & Oxfordshire. Many of the oldest records have the spelling Sherrug which may have originally been a phonetic spelling of Sharrock. In order to find many of the 'Shurrocks' listed here I searched the following names; Shurrock, Sherock, Sherrock, Shreek, Shunick, Sherrick, Sharrocks, Thurrock, Shurcock, Shwrrack, Shurrick, Sturrock, Shurrug and Sherris all of which give information on the Shurrock family line.
Jan Slikkers is the oldest known member of the family that has come to include not only Slikkers, but Sliekers and Slickers as well, with relatives in The Netherlands, Canada, the US, and even Australia.