Cognomen Kasong (Kasong 
) , all over the world, is a rare last name. The cognomen Kasong is characteristic of the Democratic Republic of the Congo, where it is a rare surname, Malaysia, and Thailand, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in the Democratic Republic of the Congo, Malaysia, and Nigeria. Very seldom, Kasong is the forename as well as the last name.