Cognomen 乌尔夫 (Ulf 
, 乌尔夫) , in all the world, is quite a rare family name. The surname 乌尔夫 is characteristic of Sweden, where it is quite a rare surname, Denmark, where it is a rare surname, and Bulgaria. Measured by absolute frequency, the name is most common in Sweden, Spain, and Germany. Predominantly, 乌尔夫 is the forename as well as the last name.