Where does “Breuci” come from?

Breuci (Latin) comes from Ancient Greek Βρεῦκοι — Breuci, a Pannonian tribe.

Ancestry of “Breuci”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Βρεῦκοι	Breuci, a Pannonian tribe

Breuci — Etymology, Origin & Word History | Etymology Explorer