Family name Choojan (Choojan 
) , throughout the world, is a rare cognomen. The cognomen Choojan is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname.
Arun, Kansuda, Kamnual, Pathida, Pachean, Paveena, Pawanda, Pornpat, Phanida, Janjira, Jakarat, Jintana, Jirapha, Naruset, Natacha, Nathida, Wannisa, Wirawan, Uraiwan, Saowanee, Sinaporn, Chayawat, Kanjana, Chalida, Attapon, Amonrut, Udom, Ubol, Monta, Sopha, Sopit, Jarun, Valai, Wirot, Merisa, Samran, Chotiros, Sombun, Katika, Janpim, Jidapa, Onnida, Wannee, Siriluk, Suchada, Somboon, Somchai, Sornsak, Apinan, and Kanchala