Last name Wonja (Wonja 
) , globally, is a rare cognomen. The cognomen Wonja is characteristic of Cameroon, where it is a rare surname, France, where it is an extremely rare surname, and China. Likewise, Wonja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wonja | China, Cameroon, South Korea, United States, France |