Cognomen 曾加 (Zenga 
, 曾加 
) , in the entire world, is quite a rare last name. The surname 曾加 is characteristic of Sub-Saharan Africa, particularly Angola, where it is quite a rare surname, the Democratic Republic of the Congo, where it is a rare surname, and Malawi. In absolute terms, the name is most common in the Democratic Republic of the Congo, Angola, and Italy. Much less frequently, 曾加 is the forename as well as the last name.