Cognomen Prayoonwong (ประยูรวงศ์ 
, Prayoonwong ) , all around the world, is a rare last name. The family name Prayoonwong is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname. Very seldom, Prayoonwong is the forename as well as the last name.
Aree, Chutisorn, Benyapha, Kanpaksorn, Poobordee, Pimprapa, Phuchisa, Punyawee, Dettarin, Jeerasak, Naruepak, Nathawan, Nattawat, Eakkawat, Youngyut, Chayaporn, Parawatree, Patcharee, Peerapong, Punyaphat, Amorntip, Thachathon, Umaporn, Waewwan, Harn, Bodin, Buppa, Sombat, Kesorn, Peecha, Rinsai, Tepumon, Ekawit, Saravut, Somsong, Chanika, Chaiyan, Kuntima, Rinrada, Daranee, Tipruthai, Ekkapoom, Eekawat, Wittaya, and Nathakamon