Family name Thamasak (Thamasak 
) , worldwide, is an extremely rare surname. The surname Thamasak is characteristic of Thailand, where it is an extremely rare surname, and the United States. More prevalently, Thamasak is the forename as well as the last name.
Chaum, Chanprasong, Vongpanich, Tiansawat, Kaewampai, Karnasuta, Sukwattana, Upaphattavanij, Thamason, Raichuang, Prakraiwan, Senaliang, Sangchai, Visaijorn, Thamhatai, Penchan, Simanaw, Luepuwapitakkul, Kuwisitsopit, Cha Um, Peeratanakul, and Sukawattana