*židovьskъ (Proto-Slavic) comes from Proto-Slavic židъ, from Proto-Slavic židovinъ, from Italian giudeo, from Latin Iūdaeus, from Ancient Greek Ἰουδαῖος, from Ancient Greek Ἰουδά, from Hebrew יְהוּדָה — Judas; Judah, Judas.