Family name Koyma (Koyma 
) , in the world, is a very rare cognomen. The surname Koyma is characteristic of Thailand, where it is a very rare surname, France, where it is an extremely rare surname, and the United Kingdom. Not in comparison with a country's population, the name is most common in Thailand, India, and France. More prevalently, Koyma is the forename as well as the last name.