Last name Erv (Erv 
) , in all the world, is a rare surname. The cognomen Erv is habitual in Taiwan, where it is a rare surname, Indonesia, where it is a very rare surname, and Thailand, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Taiwan, Indonesia, and the United States. Also, Erv is the forename as well as the last name.