Worldwide, Sĩ (Sĩ 
) is a rare boy's first name. The given name Sĩ is characteristic of South-eastern Asia, particularly Vietnam, where it is a rare masculine name. Also, Sĩ is the last name as well as the forename.
| sĩ tôn thụy politician (129-195) (b. 129) |
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| sĩ tiêm bùi (b. 1690) |
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| lê văn sĩ Vietnamese politician (b. 1910) |
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| sĩ hằng lương (b. 1923) |
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| sĩ phú Vietnamese singer, LA (b. 1942) |
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| sĩ tuấn trần (b. 1959) |
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