Family name 太一 (太一 
) , in the entire world, is a rare last name. The surname 太一 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 太一 is the forename as well as the last name.
| 加々美 太一 Japanese association football player, JP (b. 1981) |
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| 石元 太一 leader of biker gang Kanto Rengo, JP (b. 1981) |
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| 村上 太一 Japanese businessperson, JP (b. 1986) |
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| 梅澤 太一 Japanese child actor, JP (b. 1998) |
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