Cognomen Ulok (Ulok 
, อุโลก 
) , in all the world, is a rare family name. The family name Ulok is habitual in Malaysia, where it is a rare surname, Turkey, where it is a very rare surname, and Thailand. Not in comparison with a country's population, it is the most numerous in Malaysia, Indonesia, and Turkey. Very seldom, Ulok is the forename as well as the last name.