'''Sincock''' is a surname. Notable people with the surname include:
*Andrew Sincock OAM (born 1951), former first-class cricketer *Bert Sincock (1887–1946), left-handed pitcher in Major League Baseball *David Sincock (born 1942), former Australian cricketer *Harrold Sincock (1907–1982), Australian cricketer *Peter Sincock (born 1948), Australian cricketer *Russell Sincock (born 1947), Australian former cricketer
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