Cognomen ตะพาบน้ำ (Tapanut 
, ตะพาบน้ำ, Tapakaow ) , all over the world, is a very rare family name. The surname ตะพาบน้ำ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ตะพาบน้ำ is the forename as well as the last name.