Cognomen Косов (Kosow 
, Косов 
, Kosov 
) , worldwide, is a common surname. The cognomen Косов is characteristic of Eastern Europe, particularly Russia, where it is quite a rare surname, Belarus, and Ukraine. In absolute terms, it is commonest in Russia, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
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| Kosow | Germany, Canada, Poland, United States, Israel |
| Косов | Ukraine, Kazakhstan, Bulgaria, Belarus, Russia |
| Kosov | Germany, Albania, Bulgaria, Russia, United States |
| косов, василий николаевич UA (b. 1904) |
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| косов, василий владимирович RU (b. 1910) |
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| косов, анатолий васильевич RU (b. 1916) |
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| косов, даниил александрович RU (b. 1917) |
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| косов, виктор николаевич RU (b. 1922) |
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артём вячеславович косов Russian rower, RU (b. 1986) |
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| косов, николай николаевич RU (b. 1955) |
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| косов дмитрий алексеевич Russian athletics competitor, RU (b. 1968) |
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| косов, сергей андреевич Russian association football player, RU (b. 1986) |
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| косов, ярослав алексеевич Russian ice hockey player, RU (b. 1993) |
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| алексей викторович косов Turkmenistan-born Russian weightlifter, RU (b. 1994) |
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Ян, Илья, Иван, Елек, Егор, Саид, Саша, Стас, Уриы, Яків, Олег, Яков, Іван, Ігор, Юрий, Юрій, Єгор, Костя, Кирил, Макар, Марат, Ілля, Мурат, Жорж, Женя, Лев, Юра, Коля, Макс, Марк, Миша, Амир, Адип, Глеб, Жолт, Поль, Петр, Пётр, Дима, Наум, Ваня, Витя, Вова, Влад, Леха, Паша, and Анзор