Cognomen Munha (Munha 
) , all around the world, is a rare last name. The family name Munha is characteristic of Portugal, where it is a rare surname, Thailand, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Portugal, India, and Thailand. Likewise, Munha is the forename as well as the last name.