I provided facts as well, so let's use your own sources shall we?

  A person in the same position, involved in the same activity, or otherwise associated with another. [1]

You conveniently ignored that when you attempted to mispaint actual facts in your comment. Here I'll even add another source:

  ​used of people or a person with whom you share something, esp. the same kind of job, interest, or experience [2]

[1] https://en.oxforddictionaries.com/definition/fellow

[2] https://dictionary.cambridge.org/us/dictionary/english/fello...

You linked to "fellow", not "fella".

https://dictionary.cambridge.org/us/dictionary/english/fella

Did you read my original comment at all? I'm sorry, I'm not engaging you on this any further.