Cognomen Watthanarat (Watthanarat 
) , around the world, is a rare surname. The family name Watthanarat is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Watthanarat is the forename as well as the last name.
Chum, Pattamakorn, Nanthasak, Preedanuch, Anyamanee, Surangrat, Duongsamorn, Rosesumarin, Chulaporn, Thananthuch, Sudpramote, Panupan, Muntana, Dokaor, Apinan, Sakhon, Wasan, Dokao, Nara, Supreeda, and Thitichaya