Cognomen Phiukhao (Phiukhao 
) , throughout the world, is a very rare surname. The family name Phiukhao is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
Onuma, Prayad, Wipawon, Margaret, Jatuporn, Chitchanok, and Praphatsorn