ゲエズ語
Zera Yacob (; "zar'ā yāʿiqōb" "Seed of Jacob," modern "Zer'a Yā'iqōb"; also spelled "Zärˀä Yaˁqob", "Zar'a Ya'aqob", or "Zar'a Ya'eqob"; 31 August 1599 – 1692) was a seventeenth-century Ethiopian philosopher from the city Aksum. His 1667 treatise, developed around 1630 and known in the original Ge'ez language as the "Hatata" ("Inquiry"), has been compared to René Descartes' "Discours de la méthode" (1637).