Family name Ganka (Ганка 
, Ganka 
) , throughout the world, is quite a rare cognomen. The cognomen Ganka is characteristic of Bulgaria, where it is quite a common surname, the Democratic Republic of the Congo, where it is quite a rare surname, and Israel, where it is a very rare surname. Measured by absolute frequency, it is commonest in Bulgaria, the Democratic Republic of the Congo, and the United States. Also, Ganka is the forename as well as the last name.