Xǔ Yìnglóng 許應龍 (1168–1248), zì Gōngfǔ 恭甫, was a Southern Sòng official from Mǐnxiàn 閩縣 (Fúzhōu, modern Fújiàn). He passed the jìnshì examination in Jiādìng 1 (1208), began his career as Educational Officer of Tīngzhōu 汀州, then ascended through Guózǐ sīyè and Guózǐ jìjiǔ to acting service in both the Secretariat and Hanlin Academy, and ended his career at Duānmíngdiàn xuéshì and Qiānshū Shūmìyuàn shì (administering the Bureau of Military Affairs, briefly in 1239) and tíjǔ Dòngxiāo gōng. He was a Prefect of Cháozhōu, where his administrative success in pacifying frontier banditry was ranked alongside Lǐ Zōngmiǎn 李宗勉’s at Tāizhōu. He was renowned in his time as one of the most efficient imperial-edict drafters of the Lǐzōng court, famous for the yīyè sānmá anecdote (drafting three high-grade imperial edicts in a single late-night summons). His extant biéjí is Dōngjiàn jí 東澗集 KR4d0316 (14 juǎn, Sìkù reconstruction from Yǒnglè dàdiǎn). CBDB notes a “matrilateral cross-cousin marriage” — his wife (née Zhāng 張) was the niece of his mother (also née Zhāng).