Cognomen Kolega (Kolega 
, Collega 
) , all over the world, is quite a rare family name. The surname Kolega is habitual in Southern Europe, particularly Croatia, where it is quite a common surname, Slovenia, where it is quite a rare surname, and North Macedonia. In absolute terms, it is the most numerous in Croatia, the United States, and Poland. Much less frequently, Kolega is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kolega | Australia, Poland, United States, Slovenia, Croatia |
| Collega | Italy, Brazil, United States, Netherlands, Belgium |
| nataša kolega Yugoslav handball player, HR (b. 1966) |
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| michal kolega (b. 1964) |
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| živko kolega Croatian politician |
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| john kolega researcher |
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| nataša kolega SI |
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| john j. kolega |
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| elias kolega Croatian alpine skier, HR (b. 1996) |
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| samuel kolega Croatian alpine skier, HR (b. 1999) |
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Mr, Kali, Kris, Pero, Roko, Rick, Riko, Dean, Dave, Dino, Dora, Duje, Greg, Leon, Luka, Joso, John, Ján, Toma, Tony, Toni, Tina, Bill, Chad, Anka, Anne, Ms, Ana, Ben, Dan, Joe, Tom, Tea, Edi, Ema, Iva, Nada, Ivo, Mary, Mate, Maja, Miro, Sara, Sean, Stiv, Alen, Aldo, Ante, Wil, and Nick