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]
(..) The money comes from his own family and will be administered by the Vatican. Does that answer your question? I have always believed that helping your fellow man is profitable in every sense, personally and bottom line. My fellow shareholders, if Europe and America can learn to co-operate, (..)1990 The Godfather Part III