Family name จำรูญ (Jumroon 
, Chamroon , Chamrun 
) , in the entire world, is a rare surname. The family name จำรูญ is habitual in Thailand, where it is a rare surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, จำรูญ is the forename as well as the last name.