Where does “Fryer” come from?

Fryer comes from English friar, from Latin frater meaning brother, from Proto-Indo-European bʰréh₂tēr with the same sense.

Ancestry of “Fryer”, step by step

Step	Language	Word	Meaning
1	English	friar	A member of a mendicant Christian order such as...
2	Middle English	frere	any of one's male associates, friends, buddies,...
3	Old French	frere	brother
4	Latin	frāter	—
5	Proto-Italic	frātēr	brother
6	Proto-Indo-European	bʰréh₂tēr	brother

Fryer — Etymology, Origin & Word History | Etymology Explorer