Surname Semak (Semak 
, Семак 
, סמאק 
) , all around the world, is quite a rare cognomen. The family name Semak is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Russia. Much less frequently, Semak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Semak | United States, Indonesia, Russia, Poland, Myanmar |
| Семак | Ukraine, Kazakhstan, Russia, Belarus, Kyrgyzstan |
| סמאק | Israel |
Siemak, Богданович, Сямак, Сёмак, and سماک
| michael semak (born 1934), CA (b. 1934) |
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| oleg semak (b. 1951) |
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| semak iv researcher |
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| matthew r semak researcher |
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| vladislav semak researcher ORCID ID = 0000-0003-2156-2267 |
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| marija semak Danish athletics competitor (b. 1985) |
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| nikolai semak Russian footballer, RU (b. 1986) |
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| anastasia petrovna semak RU (b. 1982) |
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