Wú Yǔjiǔ 吳與九 (style Shuāngxī 雙溪, mid-19th c. 清), Jiāngnán medical-publisher and son of the physician 吳硯丞 Wú Yànchéng. Author of the 1853 preface to his father’s Mázhěn bèiyào fānglùn 麻疹備要方論 (KR3ej054). Wú Yǔjiǔ arranged the printing of this work as a companion volume to the Shénjiǔ jīnglún 神灸經綸 acupuncture-moxibustion work that Wú Yànchéng had previously edited. CBDB has no entry.