Throughout the world, Sỹ (Sỹ 
) is a rare masculine forename. The forename Sỹ is characteristic of South-eastern Asia, particularly Vietnam, where it is a rare boy's name. Likewise, Sỹ is the last name as well as the forename.
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nguyễn quốc sỹ physicist and academician (b. 1967), VN (b. 1967) |
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| sỹ tiến VN (b. 1916) |
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sỹ luân VN (b. 1982) |
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| nguyễn hồng sỹ VN (b. 1937) |
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| nguyễn văn sỹ Vietnamese association soccer (b. 1971) |
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| lê văn sỹ VN (b. 1964) |
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