Surname Семьон (Semion 
, Семьон 
) , throughout the world, is quite a rare last name. The cognomen Семьон is characteristic of Moldova, where it is quite a rare surname, Georgia, and Croatia, where it is a rare surname. In absolute terms, this name is the most popular in Nigeria, Philippines, and Ethiopia. Also, Семьон is the forename as well as the last name.