Cognomen Phirasorn (Phirasorn 
) , around the world, is a very rare last name. The family name Phirasorn is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
Lek, Prapan, Damisa, Inchan, Taphain, Chokmanat, Piyasiri, Nattawut, Nachayada, Waruntorn, Chinnachot, Pongsakorn, Nattanicha, Rattanaporn, and Duangruethai