Family name Oltu (Oltu 
, Олту 
) , in the world, is a rare last name. The family name Oltu is habitual in Eastern Europe, particularly Moldova, where it is quite a rare surname, Romania, where it is a rare surname, and Ukraine. In absolute terms, this name is the most popular in Romania, Turkey, and Moldova. Much less frequently, Oltu is the forename as well as the last name.