Etymology of the English word judaism
the English word judaism
derived from the Old French word Judaisme
derived from the Late Latin word Iudaismus
derived from the Greek word Ioudaismos, Ἰουδαϊσμός ('Judaism'; the Jewish faith and usages)
derived from the Greek word Ioudaios, Ἰουδαῖος (Judaean; belonging to Jehudah)