Last name Kiengsak (Kiengsak 
) , throughout the world, is an extremely rare family name. Much more frequently, Kiengsak is the forename as well as the last name.
Kwanma, Mayhugh, Watpoosak, Chilasak, Inthanon, Apiratmontree, Chaloensuk, Khammanivong, and Pongkittipun