Where does “Ἰσκαριώτης” come from?

Ἰσκαριώτης (Ancient Greek) comes from Latin sīcārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ἰσκαριώτης (Ancient Greek): Iscariot, a byname of the biblical Judas, one of the apostles of Jesus of Nazareth in the gospels of the Christian Bible