Cognomen Kulthira (Kulthira 
) , throughout the world, is an extremely rare last name. Predominantly, Kulthira is the forename as well as the last name.
Bundit, Saewang, Kitkiat, Luekrajang, Maliwong, Limdaengsa Nguan, Limdaengsanguan, Apiraksana, and Tantayaporn