Where does “freire” come from?

freire (Old Portuguese) comes from Old Occitan fraire, from Latin frāter, from Proto-Italic frātēr, from Proto-Indo-European bʰréh₂tēr — brother.

Ancestry of “freire”, step by step

Step	Language	Word	Meaning
1	Old Occitan	fraire	brother
2	Latin	frāter	—
3	Proto-Italic	frātēr	brother
4	Proto-Indo-European	bʰréh₂tēr	brother

freire — Etymology, Origin & Word History | Etymology Explorer