Shelvock is a name of Saxon origins - from the Old English scelf meaning a shelf of level ground, or flat topped hill, and ac meaning oak, taken from the ancient Manor of Shelvock, near Ruyton-XI-Towns, Shropshire, England originally pronounced "shelf'ac", "shelv'ak" or "shelv'oak", but today as "shel'vock".
All families with this name (and associated variants Shilvock & Shelvoke) are believed to be given to tenant-farmers and servants attached to the manor.
In the 1890s, then a farm house in the Parish of Ruyton-XI-Towns (Ruyton-of-the-Eleven-Towns, or simply Ruyton), Shelvock was part of the Tedsmore Hall property.
Shilvock - pronounced shil'vok - the variant created in the 17th or 18th century by Black Country (North Worcestershire/South Staffordshire) dialect and is the dominant family name and spelling today.
Both family names can be found in Central England, the US, Canada, Australia and New Zealand.