Family name Koonyosying (Koonyosying 
) , throughout the world, is a rare cognomen. The surname Koonyosying is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
Supat, Pisidsakk, Onnitcha, Yanisa, Sasipim, Sirikul, Supapit, Pimpisid, Phonragrit, Tinakrit, Pongpisid, Pisidpong, Khwanruean, and Piyamontri