Cognomen Iwamoto (イワモト 
, Iwamoto 
, Ивамото 
) , in all the world, is quite a rare family name. The cognomen Iwamoto is habitual in Japan, where it is a rare surname, Brazil, and Singapore. Measured by absolute frequency, it is the most numerous in Brazil, Japan, and the United States. More frequently, Iwamoto is the forename as well as the last name.
| iwamoto kansai Japanese swordsmith (1841-1918) (b. 1841) |
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| magurito iwamoto US (b. 1891) |
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kim coco iwamoto Member of the Hawaii Board of Education, US (b. 1968) |
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| ralph iwamoto American painter (b. 1927) |
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emiri iwamoto Japanese karateka, JP |
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| yoshikazu iwamoto Japanese musician, JP (b. 1945) |
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| takeshi iwamoto Japanese ice hockey player, JP (b. 1949) |
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| lisa iwamoto japanese-American architect (b. 1963) |
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| yuki iwamoto actor, JP (b. 1964) |
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| kōji iwamoto Japanese candidate (b. 1965) |
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| junko iwamoto (b. 1960) |
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| sage k iwamoto researcher |
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| hiroshi iwamoto researcher (ORCID 0000-0002-3238-2192) |
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| ryo iwamoto researcher |
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| sean j iwamoto researcher |
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