Surname น้ำเต้า (Ngamnet 
, Nambut 
, น้ำเต้า) , throughout the world, is a rare cognomen. The cognomen น้ำเต้า is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, Indonesia, where it is a very rare surname, and Malaysia. In absolute terms, it most frequently occurs in Thailand, Indonesia, and Nigeria. Very seldom, น้ำเต้า is the forename as well as the last name.