Throughout the world, Bonja (Bonja 
, Боня 
) is quite a rare unisex first name. The first name Bonja is characteristic of Ethiopia, where it is quite a rare predominantly girly, but very infrequently masculine name, India, where it is a very rare principally masculine, but scarcely girly name, and Tanzania, where it is a very rare boy's name. Also, Bonja is the last name as well as the forename.