Betty wrote:
Avon as literal bastard is an idea you see a lot in fanfic, and it
seems like a pretty plausible one to me. The man obviously has a chip on his shoulder that's been there for a very long time, and having grown up under some kind of social stigma, or in a disadvantaged social position due to something like illegitimacy could certainly explain it.<
Only if illigitimacy causes a social stigma or disadvantage in the Federation. We have no canonical evidence for or against that, but considering the tolerant attitude to unmarried couples, I would assume that illigitimicy doesn't carry the stigma it did until recently in our Western societies.
Marian