Cognomen Портнов (Portnov 
, Портнов 
) , all over the world, is a common family name. The surname Портнов is habitual in Russia, where it is quite a rare surname, Cyprus, and Israel. Not in comparison with a country's population, it most frequently occurs in Russia, Ukraine, and Kazakhstan.
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| Portnov | Israel, China, Russia, United States, Cyprus |
| Портнов | Ukraine, Belarus, Russia, Kyrgyzstan, Kazakhstan |
| портнов, ларион фёдорович RU (b. 1749) |
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лео портнов musician, composer, teacher, UA (b. 1875) |
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| портнов, анатолий александрович Soviet psychiatrist (1914-2006), RU (b. 1914) |
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| портнов, иван борисович RU (b. 1905) |
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| портнов, сергей иванович RU (b. 1906) |
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| портнов, виктор петрович Soviet and Russian law scholar, RU (b. 1921) |
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андрей владимирович портнов Ukrainian lawyer and politician, UA (b. 1973) |
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| портнов, анатолий артемьевич association football player, RU (b. 1925) |
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| георгий анатольевич портнов Soviet conductor and composer (1928-2017), RU (b. 1928) |
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андрій володимирович портнов Ukrainian historian, essayist, and editor, UA (b. 1979) |
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| портнов, юрий алексеевич RU (b. 1920) |
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| портнов, фома григорьевич LV (b. 1921) |
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| портнов, григорий андреевич RU (b. 1923) |
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| портнов, михаил васильевич RU (b. 1925) |
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| портнов, вячеслав николаевич Soviet association football player, RU (b. 1942) |
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Ян, Яков, Ілля, Іван, Ігор, Юрий, Юрій, Єгор, Фёдор, Эрнст, Костя, Макар, Марат, Абрам, Алекс, Антон, Артем, Артур, Артём, Борис, Павло, Павел, Саня, Егор, Иван, Илья, Лев, Юра, Коля, Макс, Марк, Миша, Гоша, Гиви, Глеб, Паша, Петро, Петр, Пётр, Дима, Ваня, Вася, Вера, Влад, Віль, Лука, Женя, Олег, Петя, and Данил