Last name Semia (Semia 
, Sémia 
) , all around the world, is a rare cognomen. The last name Semia is characteristic of Bosnia and Herzegovina, where it is quite a rare surname, Tunisia, and North Macedonia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Tunisia, Nigeria, and Bosnia and Herzegovina. More frequently, Semia is the forename as well as the last name.