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]
(..) Two wear tunics over their armour... ...and two have full-length robes. Two are grasping swords. And one-- Two are praying. This one has his arms at his sides. Oh, and this poor fellow has almost disappeared entirely. I don't see any orb that ought be on a tomb. "Ought be on his tomb." (..)2006 The Da Vinci Code