Family name Kawai (カワイ 
, Kawai 
, Каваи 
) , globally, is quite a common surname. The cognomen Kawai is characteristic of Hong Kong, where it is quite a rare surname, Papua New Guinea, and Japan. Not in comparison with a country's population, this name is the most popular in Japan, Indonesia, and the United States. More frequently, Kawai is the forename as well as the last name.
| VARIANT | COUNTRY |
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| カワイ | Japan |
| Kawai | Hong Kong, Taiwan, United States, Indonesia, Japan |
| Каваи | Russia |
| matagorou kawai (b. 1615) |
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| sunʼō kawai (b. 1767) |
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kawai juzo politician (b. 1854) |
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kawai michi Japanese educator (b. 1877) |
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senro kawai (b. 1871) |
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| shinzo kawai Japanese artist (1867-1936) (b. 1867) |
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| kawai jittaro (b. 1865) |
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| takeichi kawai Japanese potter (1908-1989), JP (b. 1908) |
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| saburo kawai (b. 1908) |
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yūmi kawai Japanese actress |
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| reishin kawai Japanese aikidoka, JP (b. 1931) |
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| takerō kawai (b. 1922) |
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| teizi kawai (b. 1925) |
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| keiichi kawai (b. 1932) |
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| takao kawai (b. 1938) |
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