Cognomen Horjak (Horjak 
, Хоряк 
) , throughout the world, is a rare family name. The family name Horjak is habitual in Slovenia, where it is quite a common surname, Croatia, where it is a rare surname, and Belarus. Not in comparison with a country's population, the name is most common in Slovenia, Russia, and Ukraine. Much less frequently, Horjak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Horjak | France, Croatia, Slovenia |
| Хоряк | Russia, Ukraine, Belarus |
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dušan horjak SI (b. 1920) |
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ciril horjak Slovene artist and illustrator, SI (b. 1975) |
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| branko horjak Yugoslav footballer, SI (b. 1950) |
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| cédric horjak French footballer, FR (b. 1979) |
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| marjeta horjak SI |
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| luka horjak Slovene linguist, SI (b. 1994) |
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