Family name Yutthasak (Yutthasak 
) , globally, is an extremely rare surname. The family name Yutthasak is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Yutthasak is the forename as well as the last name.
Kaje, Hengbaru, Hwangdee, Sungthong, Srirawitthaya, Choksamai, Khamsakda, Prusmateekul, Prusmatekul, Janthawong, Tuntasuth, Wasanachitt, Yincharoen, Sawangpisalkit, Suriyawong, Sriworakul, Chotcharoen, Pancharoen, Phiencharuen, Phromwongsa, Ratanamusik, Boonprasert, Tantasiman, Phaithun, Pitukphol, Kaewvitkij, Yana, Ubon, Saisen, Sukkai, Chusak, Kerdpu, Panich, Rotjan, Todtong, Fangkwa, Sinlaparatsamee, Saithip, Klommuang, Pantang, Pansiri, Poblaap, Ruamsuk, Dounsaeng, Gongkum, Wuthakorn, Yannetr, Suepsing, Saeyong, and Kanokwongsakul