Quanzhou (also known as Zayton or Zaiton in British and American historical sources) is the atonal pinyin romanization of the city's Chinese name , using its pronunciation in the Mandarin dialect. The name derives from the city's former status as the seat of the imperial Chinese Quan ("Spring") Prefecture. Ch'üan-chou was the Wade-Giles romanization of the same name; other forms include Chwanchow-foo, Chwan-chau fu, Chwanchew, Ts'üan-chou, Tswanchow-foo, Tswanchau, T'swan-chau fu, Ts'wan-chiu, Ts'wan-chow-fu, Thsiouan-tchéou-fou, and Thsíouan-chéou-fou. The romanizations Chuan-chiu, Choan-Chiu, and Shanju reflect the local Hokkien pronunciation.