Family name 清原 (清原 
, Kiyohara 
) , in all the world, is a rare last name. The last name 清原 is habitual in Hong Kong, where it is quite a rare surname, Peru, where it is a very rare surname, and Japan. In absolute terms, this name is the most popular in Brazil, China, and Japan. Likewise, 清原 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 清原 | China |
| Kiyohara | Brazil, China, United States, Hong Kong, Japan |
| 清原 武彦 Japanese businessperson, JP (b. 1937) |
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| 清原憲一 Japanese announcer, JP (b. 1950) |
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| 清原邦彦 JP (b. 1947) |
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| 清原りょう Japanese AV idol, JP (b. 1986) |
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| 清原みゆき JP (b. 1984) |
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