I really like
Arthur, it used to be one of my absolute favourte boys names.
My combo of choice was
Arthur Moses (AM intials are a family thing and I was a bit hooked on them at the time- my top boys names where
August Malachi,
Addison Micah and
Arthur Moses).
I definitley think it works on a modern child. It fits in fine with the other names-
Carys sticks out a bit, but I'm not one to get hung up over sibling names going together, so it gets a thumbs up from me.