Yáo Yǒngjì 姚永濟 (zì Rǔjí 汝楫, late Wànlì 萬曆), late-Míng physician. Author of the Kǎo zhèng bìng yuán 考證病源 (KR3er026), a four-juǎn clinical handbook on disease aetiology with a tightly aphoristic mnemonic-verse drug-formulary; the work’s self-preface is dated Wànlì dīngyǒu (1597). Yáo’s biographical detail is otherwise unrecovered from the source; the late-Wàn-lì dating is the secure evidence. No CBDB record.