Cognomen Termsak (Termsak 
) , across the world, is a very rare last name. The last name Termsak is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more prevalently, Termsak is the forename as well as the last name.
Kulem, Singsomboon, Srisawang, Sriwichai, Charuprapakorn, Chuntraruk, Boonkrajai, Kantawong, Kitsanadecha, Pongsuppet, Poungsuwan, Phingkhasan, Ruangrayont, Tantrakun, Honghiran, Opasayanont, Yaibuathong, Chindakoon, Chiangpradit, Kongsumran, Hantapanawong, Chatsakunpen, Sangchoat, Jindakul, Limjindanuwat, Doungbud, Romkum, Numwong, Homdok, Wasino, Sangsri, Sangoun, Suknakha, Chimhad, Buadaeng, Kerdkul, Worapongsatitaya, Rattonyu, Varnasup, Ukkutanon, Sakdaporn, Senakoon, Srisaard, Boonsiri, Khamsomsri, Pakpattara, Prathum Arj, Ruaengsuksri, Ragtong, and Kanjanasunton