Family name Fenyk (Fenyk 
) , all over the world, is a rare last name. The family name Fenyk is characteristic of Czechia, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Australia. In absolute terms, it most frequently occurs in Czechia, the United Kingdom, and the United States. Also, Fenyk is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fenyk | Germany, United Kingdom, Czechia, United States, Poland |
| jaroslav fenyk Czech vicedirector of Constitutional court of the CR, attorney, lawyer and public prosecutor, CZ (b. 1961) |
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| tomáš fenyk Czech association football player, CZ (b. 1979) |
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| stepan fenyk researcher (ORCID 0000-0001-9235-5682) |
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