Cognomen Manasen (Manasen 
, มานะเสน ) , all over the world, is a rare last name. The last name Manasen is characteristic of Thailand, where it is a rare surname, Honduras, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Thailand, Nigeria, and the United States. Likewise, Manasen is the forename as well as the last name.