Last name Hy (Hy 
, ハイ 
, Хай 
) , in all the world, is a common family name. The surname Hy is characteristic of Brunei, where it is quite a common surname, Syria, where it is quite a rare surname, and Macao. In absolute terms, it is commonest in Indonesia, Egypt, and China. Also, Hy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Hy | China, Indonesia, Vietnam, Egypt, Myanmar |
| ハイ | Japan |
| Хай | Kazakhstan, Armenia, Russia, Belarus, Ukraine |
| Hý | Morocco, Vietnam, Egypt, India |
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micae hồ đình hy Vietnamese mandarin official, VN (b. 1808) |
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| hy lượng phạm (b. 1834) |
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| félix charles hy French botanist and priest (1853–1918), FR (b. 1853) |
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hy cohen American baseball player (1931-2021), US (b. 1931) |
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| hy zaret American lyricist and composer (1907-2007), US (b. 1907) |
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| hy freilicher American artist (b. 1907) |
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| hy gardner American journalist, US (b. 1908) |
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| hy hirsch American photographer and filmmaker (1911-1961), US (b. 1911) |
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| karl otto hy DE (b. 1904) |
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| hy turkin American sportswriter, US (b. 1915) |
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| hy peskin photographer, US (b. 1915) |
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| hy hollinger American journalist, US (b. 1918) |
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| hy hazell English film actress (1919-1970), GB (b. 1919) |
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| hy averback American actor (1920-1997), US (b. 1920) |
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| hy gotkin American basketball player (1922-2004), US (b. 1922) |
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