Cognomen Nikolaenko (Николаенко 
, Nikolaenko 
) , in the world, is a common surname. The cognomen Nikolaenko is habitual in Eastern Europe, particularly Moldova, where it is quite a common surname, Belarus, and Russia. Measured by absolute frequency, it is the most numerous in Russia, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
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| Николаенко | Kazakhstan, Russia, Belarus, Moldova, Ukraine |
| Nikolaenko | Uzbekistan, Russia, Spain, Georgia, Belarus |
Nikolajenko, Nikolayenko, and Ніколаенко
| nikolaenko evdokia ivanovna Soviet botanist (1899-1960), RU (b. 1899) |
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| vitaliy nikolaenko chess player (b. 1948) |
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| aleksandra nikolaenko Russian writer, winner 2017 Russian Booker prize, RU (b. 1976) |
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| liana nikolaenko researcher |
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| volodymyr nikolaenko actor |
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| vladimir i. nikolaenko Russian particle physicist |
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| nikolaj petrovič nikolaenko RU |
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| vita nikolaenko Belarusian association football player, BY (b. 1995) |
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| anna nikolaenko Ukrainian association football player, UA |
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Mr, Niki, Nina, Neko, Elen, Edik, Eric, Erma, Egor, Vita, Vera, Vova, Inga, Inna, Ilia, Ilya, Ivan, Igor, Olia, Olga, Oleg, Olya, Nick, Olra, Juri, Lina, Ms, Max, Ana, Ann, Ira, Yan, Maks, Mila, Sofo, Soso, Stas, Alex, Alla, Anna, Anya, Cora, Roma, Dima, Lena, Leah, Lexa, Jake, and Yana