Cognomen 窪田 (Kubota 
, Utsubo 
, 窪田 ) , in the world, is quite a common family name. The last name 窪田 is habitual in Paraguay, where it is quite a rare surname, Jamaica, and Singapore. Measured by absolute frequency, it is commonest in Brazil, Japan, and the United States. Very seldom, 窪田 is the forename as well as the last name.
| 窪田忠彦 Japanese mathematician (1885-1952), JP (b. 1885) |
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| 窪田隼人 JP (b. 1924) |
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| 窪田哲也 Japanese politician, JP (b. 1965) |
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| 窪田あつこ Japanese actress, JP (b. 1972) |
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| 窪田龍二 Japanese association football player, JP (b. 1976) |
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| 窪田博之 Japanese diplomat, JP |
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| 窪田涼子 actor, JP |
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