Mid-Táng scholar-official and orthographer of the Yánshì philological lineage, fl. 714. Father of Yán Gāoqīng 顏杲卿 and uncle of the calligrapher Yán Zhēnqīng 顏真卿; member of the line that includes Yán Zhītuī 顏之推 (author of the Yánshì jiāxùn) and Yán Shīgǔ 顏師古 (canonical Hànshū commentator and his great-uncle). Held offices including Prefect of Chú 滁, Yí 沂, and Háo 濠 — three prefectures — and was posthumously awarded Mìshū jiàn. His sole surviving work, the Gānlù zìshū KR1j0023, is the foundational Táng manual of orthographic standardization for examination and official writing, organized in three forms (sú / tōng / zhèng — vulgar, interchangeable, correct). The work was transmitted on stone via Yán Zhēnqīng’s calligraphic copy of Dàlì 9 (774). CBDB gives the death-year 732; the Sìkù tíyào gives only the relative position in the Yán family; fl. 714 is the date attached in the catalog meta.