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]
(..) ...and more warm with a lot of people, cast and crew, production. And that's a hard gig when we're on the other side of the world. So thank you so, so much. I've had a real blast with my fellow actors. As Richard said, the crew has been ******* outstanding. And I get this. So thank you so, so much (..)2012 The Hobbit: An Unexpected Journey