Cognomen Nkaa (Nkaa 
) , around the world, is quite a rare surname. The cognomen Nkaa is characteristic of Cameroon, where it is quite a rare surname, the Democratic Republic of the Congo, where it is a rare surname, and Czechia. Measured by absolute frequency, this name is the most popular in Sub-Saharan Africa, particularly Cameroon, the Democratic Republic of the Congo, and Nigeria. Very seldom, Nkaa is the forename as well as the last name.