All over the world, Tadamune (Tadamune 
, Огасавара 
) is quite a rare boy's given name. The first name Tadamune is habitual in Eastern Asia, particularly Japan, where it is quite a rare masculine name, and China, where it is an extremely rare boy's name.
| VARIANT | COUNTRY |
|---|---|
| Tadamune | Japan, Brazil, China |
| Огасавара | Russia |
| fujiwara no tadamune (b. 1087) |
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| shimazu tadamune [島津忠宗] samurai of late-Kamakura period. founder of Chiran clan (b. 1250) |
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| shimazu tadamune [島津忠宗] samurai of mid-Kamakura period. 4th head of Shimazu clan (b. 1251) |
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| ijuin tadamune (b. 1541) |
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| minamoto no tadamune |
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