Last name ขุนน้ำ (Khunnam 
, Phunnam , ขุนน้ำ) , in all the world, is a rare surname. The surname ขุนน้ำ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ขุนน้ำ is the forename as well as the last name.