Family name Zanja (Zanga 
, Zanja 
) , in the entire world, is a common cognomen. The last name Zanja is habitual in Cameroon, where it is quite a common surname, the Democratic Republic of the Congo, where it is quite a rare surname, and Bolivia. Measured by absolute frequency, the name is most common in Cameroon, the Democratic Republic of the Congo, and Algeria. Very seldom, Zanja is the forename as well as the last name.