Last name Yongsak (Yongsak 
) , all around the world, is an extremely rare family name. Much more prevalently, Yongsak is the forename as well as the last name.
Saesee, Tantipidoke, Tonprasert, Titayanan, Nasongkhla, Ekmongkhonchai, Saringkanon, Charoensuk, Lorsutthitham, Chunhawutthiyanon, Limpitheeprakarn, Tanarsuwongkun, Na Songkhla, Sophonthaninpat, Kongthanarat, Rattanawiriya, Tangpoolponsavatdi, Putsawatanachai, Srisuksawatdikun, Trumikaborworn, Tantakijwattana, Srisuk, Kaoian, Jitijesadaporn, Nuisuk, Meetong, Autatin, Khiujaroen, Tanlahasuntorn, Grayson, Ekprachyasakul, Fakkaew, Seanglaw, Srisawat, Chatseerung, Choonuan, Kangyang, Natpracha, and Kasiphongphaisan