Cognomen Pratchayaporn (ปรัชญาภรณ์ 
, Pratchayaporn , รัชยาภรณ์ ) , worldwide, is a very rare family name. The cognomen Pratchayaporn is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. More frequently, Pratchayaporn is the forename as well as the last name.
Bo, Thatrahan, Thavorsuwan, Viprasit, Wongmeta, Upramong, Santhamit, Sangthong, Sanankhueang, Chatchana, Pruksawan, Phincharoen, Tanpraphat, Thawephol, Wangpratchayanont, Wongsensa, Chuliwanlee, Phakrueangrit, Rattanarak, Anansirikul, Pattaraponsan, Prateepkulvong, Pitaklarb, Ponsrirach, Paibunthanabut, Paibuntanabut, Arom, Surin, Prata, Nasok, Aksorn, Rogers, Lropan, Hendry, Sadchuen, Annopdecha, Rodjanasuvorapong, Chanhom, Kuearod, Rubrong, Deeruksa, Doemlim, Leepong, Limsiwilai, Teaphet, Nongmuang, Sittipan, Choonukhow, Chitjuck, and Pratchayawanit