Cognomen Oleinikov (Олейников 
, Oleinikov 
, Олеиников ) , globally, is a common family name. The last name Oleinikov is characteristic of Russia, where it is quite a rare surname, Kazakhstan, and Belarus. Not in comparison with a country's population, it is commonest in Russia, Kazakhstan, and Ukraine.
| VARIANT | COUNTRY |
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| Олейников | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Oleinikov | Cyprus, Russia, Spain, Belarus, United States |
| Олеиников | Kazakhstan, Russia |
| igor oleinikov German painter, DE (b. 1968) |
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| kira oleinikov researcher |
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| artem d oleinikov researcher (ORCID 0000-0002-9448-8160) |
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| vyacheslav alekseevich oleinikov Ph.D. Lomonosov Moscow State University 1966 |
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| vladimir oleinikov researcher |
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| igor oleinikov Russian volleyball player, RU (b. 1985) |
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| valery dmitrievich oleinikov |
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| alexander v. oleinikov |
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Mr, Andrei, Andrey, Rodion, Ruslan, Dmitri, Victor, Vitaly, Yevhen, Mikhail, Serguei, Artemiy, Dmitriy, Dmitrii, Vitalii, Yevgeny, Alexandr, Anastasi, Vladimir, Alexandre, Alexander, Aleksandr, Andrew, Alexei, Serhii, Sergei, Alex, Anna, Vlad, Ilya, Ivan, Igor, Oleg, Oleh, Yury, Maxim, Anastasia, Misha, Artem, Pavel, Roman, Julia, Edgar, Irina, Iurii, Yuriy, Maksim, Sergey, Anton, and Oleksandr