Zhōu Dūnyí 周敦頤 (1017–1073), zì Màoshū 茂叔, posthumous title Yuángōng 元公, hào Liánxī xiānshēng 濂溪先生 — founding figure of the Northern-Sòng Dàoxué 道學 (the Sòng-school Lǐxué tradition that became neo-Confucianism). Native of Yǒngzhōu Yíngdào 永州營道 (Húnán). His two surviving foundational texts are the Tài jí tú shuō 太極圖說 (one-page metaphysical diagram-and-commentary) and the Tōng shū 通書 (40-section essay-collection on chéng and xìngmìng) — both reproduced with Zhū Xī’s annotations at KR5i0079 and KR5i0080 respectively. Through his teaching of the Chéng brothers (Chéng Hào and Chéng Yí), Zhōu transmitted the Sòng-school metaphysics that flowered as Lǐxué under Zhū Xī. The traditional view (Zhū Xī, Tàijí tú shuō jiě, and the Sòngshǐ Dàoxué zhuàn) holds that Zhōu received the Tàijí tú through a Daoist transmission from Mù Xiū 穆修 going back to Chén Tuán 陳摶 — a claim that justifies the inclusion of the work in the Daoist Dào zàng jí yào. Standard reference: Adler, Reconstructing the Confucian Dao (SUNY 2014); Wing-tsit Chan, Reflections on Things at Hand. No CBDB record found by surname alone.