Last name Gerian (Gerian 
) , all around the world, is a rare family name. The last name Gerian is characteristic of Philippines, where it is a rare surname, Nicaragua, where it is a very rare surname, and the United States, where it is an extremely rare surname. In absolute terms, the name is most common in Philippines, the United States, and Mexico. Also, Gerian is the forename as well as the last name.