Cognomen Николаенко (Николаенко 
, Nikolajenko 
, Nikolaenko 
) , throughout the world, is a common family name. The family name Николаенко is habitual in Moldova, where it is quite a common surname, Belarus, and Seychelles (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in Russia, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
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| Николаенко | Kazakhstan, Russia, Belarus, Moldova, Ukraine |
| Nikolajenko | Germany, Lesotho, Estonia, United States, Latvia |
| Nikolaenko | Uzbekistan, Russia, Estonia, Belarus, United States |
| Nikolayenko | Germany, Russia, Spain, United States, Ukraine |
Nykolaenko, and Николенко
| николаенко, иван игнатьевич UA (b. 1886) |
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| николаенко, евгений макарович Soviet general, BY (b. 1905) |
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николаенко, леонид николаевич Soviet association football player, UA (b. 1957) |
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| николаенко, василий сидорович UA (b. 1909) |
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| николаенко, пётр иванович UA (b. 1914) |
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| николаенко, николай мефодиевич RU (b. 1917) |
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| николаенко, роман стефанович RU (b. 1918) |
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николаенко, андрей иванович Ukrainian politician, UA (b. 1979) |
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| николаенко, владимир миронович UA (b. 1920) |
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| николаенко, иван дементьевич UA (b. 1921) |
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| николаенко, александр николаевич RU (b. 1923) |
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| иван васильевич николаенко UA (b. 1924) |
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олег егорович николаенко Russian spammer, RU (b. 1987) |
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| николаенко, виталий александрович Russian naturalist, RU (b. 1938) |
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николаенко, юлия association football player, KZ (b. 1992) |
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