Cognomen Roumin (Roumin 
) , in all the world, is a very rare family name. The cognomen Roumin is characteristic of Bulgaria, where it is a rare surname, Greece, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Bulgaria, Greece, and France. Also, Roumin is the forename as well as the last name.