Cognomen Улав (Olav 
, Улав 
) , in all the world, is a rare last name. The family name Улав is characteristic of Norway, where it is quite a rare surname, Malta, and Hungary, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Norway, Spain, and Hungary. More prevalently, Улав is the forename as well as the last name.