Cognomen Namdet (Namdet 
) , all around the world, is a very rare last name. The last name Namdet is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, Namdet is the forename as well as the last name.
Sawaeng, Nonglak, Sittipol, Rodchaphuek, Waraporn, Phonmongkhon, Jiratchaya, and Kristhananda