User blog comment:Blue Sky/Mordred and Cerdan/@comment-60.231.241.31-20111221161324/@comment-5036924-20111221162112

Mm, true, but doesn't necessarily have to mean father and son - could still be any other relative or not related at all. I don't know, maybe I assumed there'd be more to Mordred's parentage like in most retellings, but you could be right.