Cognomen Uul (Uul 
, อู้) , in the entire world, is a rare surname. The cognomen Uul is characteristic of Indonesia, where it is a rare surname, Norway, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Indonesia, Nigeria, and India. More prevalently, Uul is the forename as well as the last name.