Cognomen Deleg (Deleg 
, Делег 
) , across the world, is a rare last name. The family name Deleg is characteristic of Mongolia, where it is quite a rare surname, Ecuador, where it is a rare surname, and Spain, where it is a very rare surname. Measured by absolute frequency, it is commonest in Mongolia, Ecuador, and the United States. Also, Deleg is the forename as well as the last name.