Cognomen Nantasak (นันทศักดิ์ 
, Nantasak ) , in the entire world, is a rare last name. The cognomen Nantasak is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. More frequently, Nantasak is the forename as well as the last name.
Jutin, Chaochanglek, Wanawatanakul, Chairatpattana, Sahwatdiwong, Rungnaralak, Raksrithong, Hangchat, Ngarmjit, Noochuai, Tripornchaisak, Thiptham, Tansakul, Tanagard, Ketsarapong, Janruang, Saengwijit, Lampoon, Pianjud, Pinkaew, Promrak, Klansuwan, Kanghae, Chimpet, Srinong, Songchu, Sudarak, Ongard, Chaiyo, Srisuwan, and Hongkittiyanont