Last name Patthawan (Patthawan 
) , in the world, is a very rare surname. The family name Patthawan is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, Patthawan is the forename as well as the last name.
Saelam, Boonyawairoj, Assawaprapa, Pholphaibul, Prasertwong, Nimpasansub, Jampathet, Klongbamrung, Chinnasri, Sittijunda, Ongchaikupt, Chantharaksa, Eungjongjate, Ruengjinda, Meesukmark, Manoworn, Titavunno, Ritawiroon, Somkliang, Siripor, Jitman, Bunrot, Supasa, Tanprasit, and Kanjanaphongsiri