Sivak is a Slavic-language surname derived from the nickname that refers to a man with gray hair, from the Slavic word sivy, gray, gray-haired. Dictionary of American Family Names ©2013, Oxford University Press, as cited by ancestry.com
Notable people with the surname include:
Jozef Sivák (1886–1959), Slovak politician Martín Sivak (born 1975), Argentine journalist and author Nancy Sivak, Canadian actress Peter Sivák (born 1982), Slovak ice hockey player Václav Sivák (born 1999), Czech kickboxer
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