Family name Kocis (Kocis 
) , across the world, is quite a rare surname. The cognomen Kocis is characteristic of Slovakia, where it is quite a common surname, Serbia, where it is quite a rare surname, and Czechia. Measured by absolute frequency, the name is most common in Slovakia, the United States, and Serbia.
| bryan kocis American pornographic film director (1962-2007), US (b. 1962) |
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| robert kocis Slovak footballer, SK (b. 1973) |
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| jan kocis researcher (ORCID 0000-0003-0568-3130) |
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| paul t kocis researcher |
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