Cognomen Phetrak (Phetrak 
) , worldwide, is a rare surname. The last name Phetrak is characteristic of South-eastern Asia, particularly Thailand, where it is quite a rare surname.
Yupa, Anusorn, Kannika, Korakot, Prakrit, Pittaya, Rattana, Jaruwan, Juratree, Jintana, Tayalak, Natachpong, Nalinee, Nittaya, Waratda, Warunee, Yuwadee, Saktidet, Sasiporn, Saowaluk, Sinenart, Silinlak, Alisara, Suchada, Suphanu, Siriwan, Udon, Suwit, Anong, Artit, Athit, Panja, Latda, Nared, Saruta, Sunisa, Sumonpit, Somsak, Adisak, Chanit, Khanum, Khanom, Preeda, Nisara, Mongkol, Sangiem, Sarayut, Samphan, Sophin, and Anchittha