Hé Yìsūn 何異孫
A Yuán-period scholar of unknown native place, given name only, no preserved style name. Active in the early Yuán: the Sìkù tíyào on the Shí yī jīng wèn duì 十一經問對 (KR1g0014) places his lectures in the early Yuán, since (a) the work cites the dà Yuán guān zhì 大元官制 (the official system of the Great Yuán) and (b) it remarks that an “old Confucian” still reads héng 恆 as cháng 常 to avoid the Sòng Zhēnzōng’s name-taboo — “this is evidence that the Sòng has not been long fallen”. The work also records that Hé heard Wáng Yìshān 王義山 (sobriquet Jiācūn 稼村, jìnshì of Sòng Jǐngdìng era, who took office under the Yuán as Jiāngxī rúxué tíjǔ 江西儒學提舉) lecturing at the Hángzhōu prefectural school. Hé therefore must have been a younger contemporary of Wáng — placing his floruit in the 1280s–1290s.
His sole surviving work is the Shí yī jīng wèn duì in 5 juàn, structured in question-and-answer form (modelled on Zhū Xī’s Huò wèn 或問) and covering the Lúnyǔ, Xiàojīng, Mèngzǐ, Dàxué, Zhōngyōng, Shī, Shū, Zhōulǐ, Yílǐ, Chūnqiū sān zhuàn, and Lǐjì — the heterodox “eleven Classics” of the title.