Cognomen Semka (Semka 
, Семка 
, Сёмка ) , in the world, is quite a rare family name. The cognomen Semka is characteristic of Tanzania, where it is a rare surname, Ukraine, and Russia. Very seldom, Semka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Semka | Greece, Tanzania, Poland, Russia, Croatia |
| Семка | Ukraine, Kazakhstan, Bulgaria, Belarus, Russia |
| Сёмка | Kazakhstan, Russia, Belarus |
| ryszard semka Polish architect, PL (b. 1925) |
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| semka sokolović-bertok Croatian actress (1935–2008), BA (b. 1935) |
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| piotr semka Polish journalist, PL (b. 1965) |
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