Where does “Σίλας” come from?

Σίλας (Greek) comes from Ancient Greek Σίλας, from Aramaic שְׁאִילָא.

Ancestry of “Σίλας”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Σίλας	—
2	Aramaic	שְׁאִילָא	—