Wnuk ("grandson" in Polish) is a Polish surname. Notable people with the surname include:
Edmund Wnuk-Lipiński (1944–2015), Polish sociologist and writer Lawrence Wnuk (1908–2006), Polish Catholic priest Marian Wnuk (1906–1967), Polish sculptor Oliver Wnuk (born 1976), German actor Rafał Wnuk (born 1967), Polish historian Witold Wnuk (born 1957), Polish musician
See also