Where does “Σιλάς” come from?

Σιλάς (Greek) comes from Ancient Greek Σιλᾶς, from Aramaic שְׁאִילָא.

Ancestry of “Σιλάς”, step by step

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

Σιλάς — Etymology, Origin & Word History | Etymology Explorer