Surname Matsm (معتصم 
, Matsm 
) , all over the world, is a common family name. The cognomen Matsm is characteristic of Sudan, where it is quite a common surname, Libya, and Syria, where it is quite a rare surname. In absolute terms, it most frequently occurs in Northern Africa, particularly Sudan, Egypt, and Libya. More frequently, Matsm is the forename as well as the last name.