fellow:
(also in short: ‘fella’; plural: ‘fellows‘)

two good fellows
a man or grown-up boy;
a person (usually a man) with whom another person shares a room, work or any activity, or spends time;
a guy;
a member of a society connected with some branch of learning or a member of a religious or philosophical society;
(old usage) a high ranking member of an Oxford or Cambridge College, England,

a Fellow of Royal College
The lady chided the dirty boy who tried to touch her, “Don’t touch me, you dirty fellow!”
My new neighbour is a good fellow who, unlike the previous neighbour, never makes passes at my wife!
Sam makes no bones about his bunking school and going about the town with some vulgar fellows, and this makes his mother sadder.
My doctor, Ms Janet John, M.Sc., F.R.C.S., is very knowledgeable and knows how treat any disease that one can name because she is a Fellow of Royal College of Surgeons.
Mike, a fellow artist, has got several paintings that may be worth thousands of dollars, but he doesn’t seem to cash on his talent.

Fellows of Middlebury College
