Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SINNOCK
We don't have any stats on how common this name is. This is probably because it's very rare in the UK.
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Country of origin
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Language of origin
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Related and similar surnames
The Sinnock surname in historical dictionaries
Patronymica Britannica (1860)
SINNOCK. A corruption of Sevenoaks, CO. Keiit. For the story of Sir William Sennock or Sevenoke, see Lambarde's Peramb. p. 520, and Eng. Surn. ii. 119. See also Snooks in this Dictionary. The H.R. present us with a Sinoch, demanding another etymology.