Family name Цой (Tsoi 
, Цой 
, Tsoy ) , globally, is a common cognomen. The family name Цой is characteristic of Hong Kong, where it is a common surname, Kazakhstan, where it is quite a common surname, and Kyrgyzstan (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Hong Kong, Russia, and Kazakhstan. Likewise, Цой is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tsoi, Tsoy | China, United States, Hong Kong, Taiwan, Uzbekistan |
| Цой | Kyrgyzstan, Russia, Kazakhstan, Ukraine, Uzbekistan |
| Coj | Guatemala, Mexico, France, Czechia, Indonesia |
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цой, валентин евгеньевич Russian politician (1952-2021), RU (b. 1952) |
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сергей петрович цой Russian politician, RU (b. 1957) |
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виктор робертович цой Soviet rock musician (1962-1990), RU (b. 1962) |
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| цой, моисей андреевич RU (b. 1904) |
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тетяна цой Ukrainian writer, UA (b. 1965) |
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анита сергеевна цой Russian singer, RU (b. 1971) |
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| лаврентий иванович цой KZ (b. 1916) |
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| цой, самен викторович KZ (b. 1921) |
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цой сергій геннадійович Ukrainian association football player, UA (b. 1984) |
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| цой, ольга семёновна RU (b. 1924) |
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александр рудольфович цой Russian actor and director, born 1984, RU (b. 1984) |
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| валентина васильевна цой mother of Soviet rock musician Viktor Tsoi, RU (b. 1937) |
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| роберт максимович цой father of Soviet rock singer Viktor Tsoi, RU (b. 1938) |
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| цой, владимир пенчерович Russian painter (1938-2015), RU (b. 1938) |
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анатолий цой Kazakhstani singer, KZ (b. 1989) |
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