Cognomen Ploynaphat (Ploynaphat 
) , around the world, is an extremely rare family name. Much more prevalently, Ploynaphat is the forename as well as the last name.
Yaken, Jitphimon, Thengsiritaechakit, Viratkasem, Vorradetsin, Wichitnak, Woraratjongsiri, Sakullertnithikul, Lerdthanathorn, Thanapradhitkul, Wuttiphatprecha, Charoenkantongkam, Chaitongrat, Bunyaphonpriya, Punyapattarawan, Hathainutthakul, Thititaweepun, Hathainuttakul, Srikornkul, Numrungrote, Tanawatdaycho, Phimpagoon, Tiamkroo, Hachit, Sapnaksuk, Buabarn, Konkaew, Pankaew, Pasasut, Rachnuwong, Watcharapitipun, Raweearamwong, Naktian, Sanitnan, Srikulpreecha, Amorndhamawat, Chitklar, Boonsaopoon, Kongkaew, Premsitthison, Julabat, and Phattharaboonsuksri