Surname Supphalak (สุภลักษณ์ 
, Supphalak 
) , in all the world, is a very rare cognomen. The cognomen Supphalak is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more frequently, Supphalak is the forename as well as the last name.
Suwan, Phanseng, Phetkhut, Laongpech, Jitchuen, Thepchinda, Nopphamit, Manatchai, Manuschai, Klinklub, Chopprakopkit, Jaisawang, Tehmadmah, Nobpharat, Suwannakun, Phancharoen, Lochaiyakun, Thongkhung, Sanitphakdiee, Kuwatananukul, Watthanakhiri, Khakhong, Aengthieo, Saelim, Srimai, Misaeng, Saladtuk, Saikaew, Chinrat, Banchan, Ketthip, Chaijanla, Keawsri, Potisit, Niyasom, Hasanan, Inthale, Margmool, Margmoon, Senasana, Somniyam, Kulwong, and Aintharaphong