zar'a ya`qob or zera yacob (ge'ez ዘርአ:ያዕቆብ "zar'ā yāʿiqōb", english: "descendant of jacob"; 1399 – 26 august 1468) was the emperor ("nəgusä nägäst") of ethiopia, and a member of the solomonic dynasty who ruled under regnal name kwestantinos i (ge'ez ቈስታንቲኖስ "qʷastāntīnōs") or constantine i, from the old province of shewa, where the capital of the amhara emperors was located before the post-16th-century oromo migrations and the destructive war with gran ahmad. born at telq in the province of fatajar (now part of the oromia region, near the awash river), zara yaqob was the youngest son of dawit i and his youngest wife, igzi kebra.