Cognomen Nkay (Nkay 
) , around the world, is a rare family name. The cognomen Nkay is characteristic of Angola, where it is a rare surname, the Democratic Republic of the Congo, and France, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, Angola, and Nigeria. Very seldom, Nkay is the forename as well as the last name.