Last name Tosum (Tosum 
) , in the entire world, is a rare family name. The last name Tosum is habitual in Romania, where it is quite a rare surname, North Macedonia, and Austria, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Romania, North Macedonia, and Spain. Much less frequently, Tosum is the forename as well as the last name.