Cognomen Phanthat (Phanthat 
) , globally, is an extremely rare last name. The last name Phanthat is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, Phanthat is the forename as well as the last name.
Paja, Klomcharoen, Donsophon, Chanthat, Chotlerdpaisan, Prownpuntu, Thanawut, Samuttaphan, Suchalitchan, Leelahawong, Theanthamthada, Thaweewutthiset, and Rattanakanchanawong