Last name ร่มธรรม (Romtam 
, Romthum 
, ร่มธรรม) , around the globe, is a very rare family name. The cognomen ร่มธรรม is habitual in Thailand, where it is a very rare surname, and Brazil, where it is an extremely rare surname. Also, ร่มธรรม is the forename as well as the last name.