Family name אולף (Ulf 
, אולף 
) , throughout the world, is quite a rare last name. The surname אולף is characteristic of Sweden, where it is quite a rare surname, Denmark, where it is a rare surname, and Bulgaria. Not in comparison with a country's population, it is commonest in Sweden, Spain, and Germany. Much more prevalently, אולף is the forename as well as the last name.