Xú Qiān 徐謙 (zì Zhòngguāng 仲光, fl. mid-late Míng), Míng-period physician of Jiāxīng 嘉興 (Zhèjiāng); specialist in pediatric smallpox medicine. Author of the Rénduān lù 仁端錄 (KR3e0069, 16 juan) — a comprehensive treatise on smallpox and rashes, with the final juan covering measles. The work was edited and trimmed by Xú’s disciple 陳葵 Chén Kuí. Xú has no further transmitted biographical record beyond the work.