How did you think of the idea of Robin Goodfellow being a title and not a name? I think that's pretty cool. :)
((So this bit I actually can't take credit for, although the type and structure of the title and basically everything I did with it after that point is mine.
When I RPed on LiveJournal, there was a brilliant Robin Goodfellow who was from a world where Robin was a job title. He introduced himself to one of my muses as "a Robin Goodfellow". And that idea of Robin as a title stuck with me long after the person had hiatus'ed and I'd left LJ.
Obviously, my Robin is a royalty-type title and not a job title. Which is mainly because of him being the sixteenth, to be honest. For some reason the Roman numeral XVI got stuck in my head.
Next up you had Dylan O'Brien's face, which in certain angles I went "You are not actually human are you?" and then at some point this all collided in a beautiful fusion-style explosion and I honestly have no idea how but Robin Goodfellow being a title + XVI + Dylan O'Brien + some weird subconscious weirdness = Robin.
TBH there's a ridiculous number of ideas where I couldn't pinpoint anything clearer than that. I had three separate seeds that all combined to make something only vaguely related to any of them.))