Cognomen Chaiharn (Chaiharn 
) , around the globe, is a rare last name. The family name Chaiharn is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Chaiharn is the forename as well as the last name.
Manit, Mathurot, Sirikarn, Sutthlux, Kanriyanin, Phanphat, Ruchirek, Duengduan, Jeeranan, Sumitthar, Sutthilux, Chanchira, Pornsawat, Jiraprapa, Isarawadee, Issarawadee, Wanwisa, Pongsatorn, Ekaphop, Passara, Sanya, Sawat, Sirin, Petch, Winij, Samlee, Saijai, Sinrin, Sakchai, Supansa, Sumalee, Somchok, Apichat, Khomsan, Panarin, Junchai, and Ratchadaporn