Agagi is the gentilic adjective applied exclusively to Haman, the antagonist of the book of Esther. All five occurrences (Esth 3:1, 10; 8:3, 5; 9:24) serve as an epithet — 'Haman the Agagite' — identifying him by ancestral or ethnic origin. Jewish tradition and Josephus connect this designation to Agag, the Amalekite king spared by Saul (1 Sam 15), making the Esther narrative a continuation of the ancient Israel-Amalek conflict. The multilingual evidence is revealing: Spanish uses 'el agagueo' (with a gentilic suffix), French 'Agaguite,' and German 'der Agagiter,' each forming a recognizable ethnic adjective.