Cognomen Prapoj (Prapoj 
) , all over the world, is a very rare surname. The cognomen Prapoj is characteristic of South-eastern Asia, particularly Malaysia, where it is a very rare surname. Much more frequently, Prapoj is the forename as well as the last name.
Poj, Laoweerayothin, Thongrit, Thummala, Nuammanee, Sangthong, Shattongsuk, Sujitprasert, Srinuwattiwong, Chunladecha, Dusuntia, Prasomsri, Luangwirun, Bumrungpuch, Preedavaranont, Phataraphruk, Luanthamakun, Wachirakulpisal, Khunthongjun, Jirasathitpornpong, Thammawongsa, Phetkrong, Chaithanakunmongkol, Pharahom, Petrakard, Hated, Saibut, Sonwai, Chipat, Lomket, Niamin, Suankuk, Smathong, Aramrat, Promfung, Boontol, Porneapairote, Ratiruangrong, Rodcomtui, Juerthong, Yamprai, Mashirun, Sridokruk, Chotikhun, Chuenwichit, Pramoon, and Chantarasiriwattana