Cognomen ดำรงค์ (Damrong 
, Dumrong 
, Dhumrong ) , worldwide, is a rare surname. The family name ดำรงค์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, Singapore, where it is a very rare surname, and Malaysia. In absolute terms, it most frequently occurs in Thailand, the United States, and China. More prevalently, ดำรงค์ is the forename as well as the last name.