Cognomen 望月 (望月 
, Mochizuki 
) , in all the world, is quite a rare surname. The surname 望月 is characteristic of Hong Kong, where it is a rare surname, Japan, and Singapore. In absolute terms, it is commonest in Japan, the United States, and Brazil. Also, 望月 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 望月 | China |
| Mochizuki | China, Brazil, Indonesia, United States, Japan |
Michizuki, Mochitsuki, Motizuki, and もちづき
| 望月潤一 Japanese baseball player, JP (b. 1918) |
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| 望月洋子 Japanese writer, JP (b. 1931) |
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| 望月 規夫 Japanese businessperson, JP (b. 1946) |
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| 望月太郎 Japanese actor, JP (b. 1947) |
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| 望月六郎 Japanese pornographic film director, JP (b. 1957) |
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| 望月哲也 Japanese singer, tenor, JP (b. 1973) |
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| 望月悦子 Japanese actress, JP (b. 1974) |
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| 望月ゆみ Japanese AV idol, JP (b. 1976) |
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| 望月健一 Japanese voice actor, JP |
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| 望月玲子 Japanese mangaka, JP |
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| 望月哲也 Japanese game programmer, JP |
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| 望月竜次 Japanese association football player, JP (b. 1988) |
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| 望月大地 Japanese association football player, JP (b. 1988) |
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| 望月正行 JP (b. 1979) |
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| 望月ちひろ Japanese AV idol, JP (b. 1991) |
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