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Family name Bội (Бой
, Bội
) , throughout the world, is a rare surname. The last name Bội is habitual in Vietnam, where it is a rare surname, Ukraine, and Russia, where it is a very rare surname. Also, Bội is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Бой | Kazakhstan, Russia, Tajikistan, Kyrgyzstan, Ukraine |
| Bội | Vietnam |