Where does “αλφάβητο” come from?

αλφάβητο (Greek) comes from Byzantine Greek ἀλφάβητον, from Ancient Greek ἀλφάβητος, from Ancient Greek ἄλφα, from Phoenician 𐤀𐤋𐤐, from Proto-Semitic *ʔalp- — thousand.

αλφάβητο (Greek): alphabet, a series of letters or graphics...