Last name Colja (Colja 
) , around the world, is a rare surname. The surname Colja is habitual in Southern Europe, particularly Slovenia, where it is quite a common surname, Serbia, where it is quite a rare surname, and Italy, where it is a rare surname. Very seldom, Colja is the forename as well as the last name.
| srečko colja SI (b. 1909) |
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| alojz colja Yugoslavian rower, SI (b. 1943) |
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| stojan colja IT (b. 1947) |
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| katja colja IT (b. 1969) |
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| ana colja Slovene activist and writer, SI |
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| ana colja Slovenian model, SI (b. 1981) |
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| istok colja SI |
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Mr, Mojca, Sarah, Spela, Aleš, Alice, Anže, Carla, Boris, Borut, Katja, Paula, Dejan, Dante, Damir, Dorte, Domen, Drago, Giada, Jason, Juana, Elisa, Matej, Elena, Mario, Uros, Ms, Ana, Zan, Sara, Alex, Anna, Anja, Anze, Bata, Kati, Dana, Dino, Lara, Luca, Jure, Nina, Neja, Erik, Hari, Hugo, Olga, Maria, and Helen