Family name Khankhaeng (Khankhaeng 
, ขันแข็ง , ขันแข่ง) , around the globe, is quite a rare last name. The family name Khankhaeng is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname.
Pom, Vijantra, Ubonwana, Sasithorn, Sasiwimon, Suphannee, Suchittra, Chanoknan, Chayasikanat, Benjaporn, Kannaphat, Khanittha, Phitchaya, Phimlaphat, Ratanaporn, Rawinnipha, Nuntanat, Thassanawan, Natchaya, Thanapon, Marut, Wilai, Chaiya, Netsuda, Iamsri, Orthai, Manerat, Sililak, Sirilak, Somchai, Krishna, Lukkana, Maneerat, Boontham, Jatuphat, Natthicha, and Sirinanthawan