Family name Tadatomo (Tadatomo 
) , throughout the world, is quite a rare surname. The last name Tadatomo is characteristic of Eastern Asia, particularly Japan, where it is quite a rare surname. Much less frequently, Tadatomo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tadatomo | Japan, United States |
| ogasawara tadatomo (1599-1663) (b. 1599) |
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| gamō tadatomo daimyo of the early-Edo period (b. 1604) |
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| matsudaira tadatomo [松平忠倶] daimyo of the early Edo period; 1st lord of Iiyama (b. 1634) |
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| aoyama tadatomo (b. 1708) |
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| matsudaira tadatomo [松平忠和] daimyo of the middle to late Edo period; 5th lord of Kuwana (b. 1759) |
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toda tadatomo (b. 1847) |
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| tadatomo suga researcher |
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Takeshi, and Shohiroshi