Cognomen Simsom (Simsom 
) , in the entire world, is a very rare family name. The family name Simsom is habitual in Thailand, where it is a very rare surname, Colombia, and Spain, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Thailand, Colombia, and Nigeria. Much less frequently, Simsom is the forename as well as the last name.