Family name Kaensan (Kaensan 
) , throughout the world, is a rare surname. The cognomen Kaensan is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Kaensan is the forename as well as the last name.
Supot, Amornrat, Chanatip, Chuphong, Patiphan, Peerapan, Piyapron, Punjamas, Saowalak, Rungreuthai, Naratchaya, Weerasak, Suphachai, Kriangsak, Rattawith, Thanatcha, Nopphakhun, Triyapat, Nutthaporn, Jintana, Phairin, Araya, Ladda, Thida, Misuko, Suthat, Amphon, Atipat, Ratsiri, Luktawan, Sarinya, Subsiri, Apichat, Ballang, Bunyang, Pienthong, Pitinon, Wiyada, and Kittichote