Surname มูลสิงห์ (Mun Sing 
, มูลสิงห์ 
) , across the world, is a rare cognomen. The last name มูลสิงห์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is a very rare surname. Much less frequently, มูลสิงห์ is the forename as well as the last name.