Family name Ketchaya (Ketchaya 
) , across the world, is an extremely rare cognomen. The surname Ketchaya is characteristic of Thailand, where it is an extremely rare surname, and the United States. More frequently, Ketchaya is the forename as well as the last name.
Toda, Seeta, Punda, Kansar, Thanom, Unsiwilai, Arworncharoen, Saiyarat, Semthuen, Intawicha, Jeerathirathana, Jirayanapiti, Thammakit, Thingchua, Termvivatana, and Wannasamakkee