Surname Aleksa (Aleksa 
, Алекса 
) , across the world, is quite a rare last name. The cognomen Aleksa is habitual in Lithuania, where it is quite a common surname, Serbia, and North Macedonia, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Serbia, Lithuania, and Russia. More prevalently, Aleksa is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Aleksa | Serbia, India, Bosnia and Herzegovina, Poland, Montenegro |
| Алекса | Kazakhstan, Serbia, Ukraine, Russia, Bulgaria |
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zigmontas antanas aleksa Lithuanian communist, Russian revolutionary, one of the leaders of the Communist Party of Lithuania (1882-1940), LT (b. 1882) |
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jonas pranas aleksa LT (b. 1879) |
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| julius aleksa (b. 1855) |
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| konradas aleksa (b. 1881) |
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gasparas aleksa Lithuanian artist, LT (b. 1945) |
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| jonas aleksa (b. 1896) |
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| jonas aleksa Lithuanian conductor and university teacher (1939-2005), LT (b. 1939) |
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| vytautas aleksa (b. 1930) |
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| osvaldas aleksa LT (b. 1931) |
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| zoran aleksić aleksa (b. 1950) |
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| valentinas aleksa (b. 1951) |
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| alena aleksa researcher |
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| bob aleksa college basketball player (1974–1976) Arizona |
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| gerdas aleksa Lithuanian association football player, LT (b. 1981) |
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| martynas aleksa LT (b. 1976) |
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Ilic, Ivanovic, Zivkovic, Milosevic, Stankovic, Kovacevic, Lazarevic, Jovanovic, Todorovic, Obradovic, Jankovic, Marinkovic, Mihajlovic, Mladenovic, Stefanovic, Stevanovic, Stanojevic, Stojanovic, Djordjevic, Milovanovic, Radovanovic, Milenkovic, Petkovic, Petrovic, Pavlovic, Matic, Milic, Mitic, Savic, Simic, Antic, Rakic, Gajic, Lukic, Vasic, Kostic, Krstic, Ristic, Djuric, Aleksic, Popovic, Nikolic, Vukovic, Markovic, Mitrovic, Knezevic, Dimitrijevic, and Milosavljevic