Family name Ketphan (เกตุพันธุ์ 
, Ketphan ) , in the world, is a rare last name. The last name Ketphan is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Ketphan is the forename as well as the last name.
Lex, Athipath, Cholladda, Pornphat, Pitchapa, Piyatida, Phromnachanok, Tamolwan, Suratvadee, Netnapha, Supharerk, Kornkanok, Pattapong, Prapharat, Pheerapat, Thiwongkrit, Wannaporn, Winatcharin, Siwaporn, Sireethip, Sahatcha, Lun, Tida, Hiao, Seree, Jinda, Winai, Phumin, Jaroon, Onphicha, Warisa, Wirada, Somporn, Arunrat, Ketkaew, Prathum, Pornpat, Pimwipa, Phattapong, and Jedsadapon