Cognomen 精一 (精一 
) , around the globe, is a very rare family name. The last name 精一 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 精一 is the forename as well as the last name.
| 廣田 精一 JP (b. 1871) |
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| 久米 精一 JP (b. 1897) |
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| 三井 精一 JP (b. 1942) |
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