Fèi Zéyáo 費澤堯 (fl. 1930s, Republican-era), early-Republican physician and friend of 沈仲圭 (Shěn Zhòngguī). Wrote the 1939 (Huángdì jìyuán 4637) preface to the Líng Lín língfāng 凌臨靈方 (KR3ed143) — the publication of the late-Qīng Húzhōu master Líng Xiǎowǔ’s clinical formulas, organised by Shěn Zhòngguī. The use of the Huángdì jìyuán dating (rather than the Republican-period 民國 reign-year) signals Fèi’s affinity with the early-Republican nationalist jìyuán dating movement. Sparse further biographical record.