a teaching/research 'fellow' [=a graduate student who gets money in exchange for teaching/research]
He attended the concert with a 'fellow' student. [=someone who is a student, as he is]
He has always tried to be of service to 'his fellow man'. [=to other people]
(..) Father! Huh, he ain't my father. Uh, Mr Geppetto! Hey, what the-- Hey, le-- let go! Run along, ya little... squirt. What's the matter? Can't a fellow, uh-- l was only-- We were only looking for Monstro. That got 'em. Father! Father! Oh, hello. (..)1940 Pinocchio
(..) Say hello to Figaro. Oops! Oh-ho-ho! Up to mischiefalready. You see what happens? Boo! Up we go! Ahh. You're a cute little fellow. And that smile? You know, l-- You rascal.Jealous, huh? You know, Pinocchio, l think Figaro isjealous ofyou. Oh-ho, don't worry, Figaro. l sti-- Uh-oh. (..)1940 Pinocchio