Cognomen Ogasawara (Ogasawara 
, Огасавара 
) , all over the world, is quite a rare surname. The last name Ogasawara is characteristic of Japan, where it is a rare surname, Ireland, and Singapore. Not in comparison with a country's population, this name is the most popular in Brazil, Japan, and the United States. Very seldom, Ogasawara is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ogasawara | China, Japan, Brazil, United States, Argentina |
| Огасавара | Russia |
| ogasawara nagafusa (b. 1213) |
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| ogasawara masanaga (b. 1319) |
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| mochinaga ogasawara (b. 1384) |
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| ogasawara mochinaga (b. 1396) |
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| ogasawara sadatomo (b. 1461) |
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| ogasawara nagamune (b. 1492) |
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| ogasawara hidekiyo (b. 1501) |
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| ogasawara nobusada (b. 1521) |
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| ogasawara ujioki (b. 1529) |
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| ogasawara sadayoshi (1546-1595) (b. 1546) |
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| ogasawara nobumine (b. 1547) |
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| ogasawara yoshitsugu (b. 1548) |
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| ogasawara nagatada (b. 1550) |
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ogasawara masanobu (b. 1607) |
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| ogasawara hidemasa (1569-1615) (b. 1569) |
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