Surname Trojak (Trojak 
, Трояк 
) , all around the world, is quite a rare last name. The cognomen Trojak is characteristic of Slovakia, where it is quite a rare surname, Croatia, and Czechia. In absolute terms, this name is the most popular in Eastern Europe, particularly Poland, Czechia, and Slovakia. Likewise, Trojak is the forename as well as the last name.
| józef trojak association football player (1966-2014), PL (b. 1966) |
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| paul trojak college basketball player (1967–1969) Gettysburg |
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| agata trojak production designer |
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| oliver joe trojak researcher |
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| marko trojak association football player, HR (b. 1988) |
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| tomislav trojak HR |
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| miłosz trojak PL (b. 1994) |
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