Family name Iulius (Юлий 
, Iulius 
, Юлиус 
) , across the world, is a rare last name. The family name Iulius is habitual in Romania, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Kyrgyzstan. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Romania, Russia, and Bulgaria. Much more frequently, Iulius is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Юлий | Kazakhstan, Russia, Belarus, Bulgaria, Lithuania |
| Iulius | Indonesia, Romania, Italy, Moldova, France |
| Юлиус | Kazakhstan, Russia, Estonia, Belarus, Lithuania |
| Жюль | Ukraine |
Giulio, Iouli, Ioulian, Iovis, Iulian, Iulio, Julai, Jules, Julho, Juli, Julian, Julie, Julij, Julio, Julius, Juliusz, Jullu, July, Júlio, Július, Júlíus, Jūlijs, Xullo, Youli, Yulian, Yulii, Yuliy, Yuly, Джули, Джулио, Джулиус, Жуль, Иулиан, Иулиус, Йулиус, Ульян, Хули, Хулио, Хуліо, Юлиан, Юлии, Юлий, Юлиус, Джулиус, Юлиуш, Юльюс, Юлюс, Юліан, Юлій, Юліус, Юліуш, Юліюс, Юліян, Іуліус, יוליוס, جولاي, جوليس, جوليو, خولي, خوليو, يوليوس, フリオ, ユーリ, 尤利, 尤里, 朱利, and 朱利斯
| quintus iulius |
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| aurelius iulius |
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| titus flavius iulius |
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