Zēng Guàn 曾貫, zì Chuándào 傳道, was a late-Yuán Yìjīng scholar and loyalist martyr from Tàihé 泰和 (Jí’ān 吉安, Jiāngxī 江西). He passed the provincial examination in tiānlì xīnsì 天厯辛巳 — i.e. zhìshùn 至順 2 = 1331 (note: there is no xīnsì 辛巳 in the Tiānlì reign-period 1328–1330; the Sìkù notice’s combined era-and-cycle datum is internally inconsistent and the cycle figure is the more reliable one) — and held the Yuán office of zhàomó 照磨 (records officer) in Shàoxīng prefecture 紹興府.
When the late-Yuán uprisings broke out, he resigned office and returned to Tàihé. His fellow townsmen acclaimed him as captain of a righteous militia (yìjūn 義軍), and he led a defense against the bandit forces at Lóngquán 龍泉; defeated in the field, he held to his loyalty and died in the fighting. The Sìkù editors note pointedly that the Yuán shǐ 忠義傳 failed to record his martyrdom — a “regrettable omission” they sought to correct by recovering and re-issuing his Yìxué biàntōng 易學變通 (KR1a0085) under his name.
His biography is in the Jiāngxī tōngzhì 江西通志. His other writings — including Sìshū lèi biàn 四書類辨 and Xué Yōng biāozhǐ 學庸標旨 — were already lost by the early Qīng. Only the Yìxué biàntōng, recovered fragmentarily from the Yǒnglè dàdiǎn 永樂大典, survives.