Ní Yuánlù 倪元璐 (1593–1644; catalog meta gives 1594–1644 — CBDB 1593 is preferred), zì Yùrǔ 玉汝, hào Hóngbǎo 鴻寶, posthumous title Wénzhèng 文正 (bestowed by the Qīng Shùnzhì emperor), was a late-Míng official, calligrapher, and Yìjīng scholar from Shàngyú 上虞 (Shàoxīng 紹興, modern Zhèjiāng 浙江). He passed the jìnshì examination in Tiānqǐ rénxū 天啟壬戌 = 1622 and rose successively to Minister of Revenue, concurrently Minister of Personnel, and Hànlín Academician. When Lǐ Zìchéng’s 李自成 forces took Běijīng in Chóngzhēn jiǎshēn 崇禎甲申 = 1644, Ní hanged himself in his official residence as a Míng martyr. His biography is in the Míng shǐ 明史.
His major surviving works include the Ér yì nèi yí yǐ 兒易內儀以 (KR1a0111) in six juàn and the Ér yì wài yí 兒易外儀 in fifteen juàn — paired companion works, the inner the canonical exegesis (with Yǐ 以 from Dà xiàng zhuàn’s yǐzhī wéi yán yòng yě 以之為言用也, signaling the application focus), the outer a more discursive elaboration. The title Ér yì 兒易 is glossed by Ní’s own preface in the sense of hái shǐ 孩始 (childlike beginning), as the Sìkù editors note against Jiǎng Wénjiē’s 蔣雯階 forced-attribution claim that ér 兒 (= Ní 倪 by Hàn-period graphic interchange) refers to Ní’s surname.
Ní is also celebrated as one of the major late-Míng calligraphers (alongside Huáng Dàozhōu, Wáng Duó 王鐸, Fù Shān 傅山).