Patrial or patronymic from 'Agag; an Agagite or descendent (subject) of Agag -- Agagite.
see HEBREW 'Agag
H91. Agagi
אֲגָגִי adjective, of a people of Haman (= Amalekite ? so Jewish tradition & compare JosAnt.xi.6.5) Esther 3:1, 10; 8:3, 5; 9:24.
אגד (bind, so Talmud אָגַד, Aramaic אֲגַד). **Aramaic ׳א (Talmud, once, Levy) probably Hebraism.