Last name Radoja (Radoja 
, Радоя 
) , worldwide, is a rare cognomen. The cognomen Radoja is habitual in Southern Europe, particularly Bosnia and Herzegovina, where it is quite a rare surname, Serbia, and Albania. Very seldom, Radoja is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Radoja | Serbia, Croatia, Bosnia and Herzegovina, Canada, Albania |
| Радоя | Ukraine, Bulgaria |
| ëngjëll radoja (b. 1820) |
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| guljelm radoja Albanien actor (1945-2021), AL (b. 1945) |
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| robert radoja IT (b. 1938) |
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| djordje radoja chess player (b. 1959) |
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| mark radoja Canadian poker player, CA (b. 1985) |
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| stefan radoja Serbian association football player, RS (b. 1990) |
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| stipe radoja |
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Ms, Ivan, Igor, Uros, Maria, Marko, Milan, Miles, Milos, Sandi, Erin, Steve, Anton, Bruno, Peter, Petar, Ranka, Rajko, David, Davor, Diana, Stipe, Josip, Tina, Jure, Ana, Bob, Ray, Ori, Una, Mary, Mark, Mile, Milo, Trim, Sasa, Ante, Anja, Cole, Kata, Paul, Dean, Dane, Dale, Jana, Alex, and Jovan