Cognomen Jonglak (Jonglak 
) , across the world, is a very rare surname. The family name Jonglak is characteristic of Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. More prevalently, Jonglak is the forename as well as the last name.
Choi, Thaenphutsa, Thaitawee, Boonraksa, Sriphenchai, Singhasem, Poomikograk, Harnpairoj, Jitngam, Kitidet, Kalawan, Chaimol, Somrang, Riusuwan, Pahasa, Knight, Kinun, Youn, Chomchalao, and Khrueachalee