Cognomen Maerin (Maerin 
, Маерин 
) , around the world, is a very rare last name. The surname Maerin is habitual in Romania, where it is a rare surname, Russia, where it is a very rare surname, and Mexico, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Russia, Romania, and the United States. Also, Maerin is the forename as well as the last name.