Family name Chaiyapan (ชัยพันธุ์ 
, ไชยพันธ์ , Chaiyapan 
) , around the world, is quite a rare surname. The last name Chaiyapan is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Chaiyapan is the forename as well as the last name.
Win, Pajaree, Polsorn, Poomjai, Piathip, Ploenta, Jiranuch, Nawapan, Nitaporn, Nipawan, Wanwisa, Wilawan, Wichien, Yuranan, Sahathai, Suparuck, Supaporn, Suphaluk, Chularak, Bunyuean, Kanyarat, Kittanut, Pakinai, Pairote, Panadda, Pattama, Swit, Napat, Napak, Seksan, Somjit, Areeya, Pantip, Rujira, Jaroen, Thawat, Puangsri, Maithai, Samruam, Sunaina, Sukanya, Sudarak, Suwimon, Anusorn, Chaiwat, Boonnan, Bunyueen, Krisana, Sammana, and Ganyarat