Last name Ouadja (Ouadja 
) , throughout the world, is a rare family name. The cognomen Ouadja is characteristic of Togo, where it is quite a rare surname, Finland, where it is a very rare surname, and Nigeria, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ouadja | Nigeria, Togo, Finland, United States |
| kbati ouadja association football player, TG (b. 1977) |
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| lantame ouadja Togolese association football player, TG (b. 1978) |
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