Last name Sangsai (Sangsai 
) , across the world, is quite a rare cognomen. The surname Sangsai is characteristic of Thailand, where it is quite a rare surname, and New Zealand, where it is a very rare surname. Very seldom, Sangsai is the forename as well as the last name.
Tan, Wanida, Mattika, Maitree, Mongkol, Surasak, Supapan, Sumalee, Sudarat, Somboon, Somporn, Anuchit, Chaiwit, Chakree, Chotika, Kanapan, Parkorn, Panuwat, Pelapon, Ponthep, Piyanat, Rungtiva, Ongard, Egkasit, Nuchan, Nippich, Thud, Nipa, Palmy, Likit, Nikom, Nipon, Yanee, Yupin, Marisa, Manode, Jaruwan, Saifon, Sayjai, Seksan, Amporn, Atjima, Kijnalop, Pathom, Pitoon, Junpen, Tavorn, Namfon, Sayfon, and Jaksana