Cognomen Changjan (Changjan 
) , in the entire world, is a rare last name. The family name Changjan is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, Changjan is the forename as well as the last name.
Bunloed, Kingkan, Thitima, Arpapong, Kanokwan, Roongarun, Nantakan, Rattichon, Chatchawan, and Pattaraporn