Last name Mumon (Mumon 
, Мумон) , around the world, is a very rare cognomen. The cognomen Mumon is habitual in Thailand, where it is a very rare surname, Japan, and the United States, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Japan, Thailand, and India. More frequently, Mumon is the forename as well as the last name.