Where does “Bertalan” come from?

Bertalan (Hungarian) comes from Ancient Greek Βαρθολομαῖος, from Aramaic בַּר תַּלְמַי — son of Tolmai.

Ancestry of “Bertalan”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Βαρθολομαῖος	—
2	Aramaic	בַּר תַּלְמַי	son of Tolmai

Bertalan — Etymology, Origin & Word History | Etymology Explorer