Muggle borns and squib ancestors
It’s mentioned lightly (by Dumbledore when showing Harry who Voldemort’s mother was) but I don’t think it’s explicitly stated that muggle borns are likely the descendants of squibs or other outcasts of pureblood families. Hermione for example has many things (I’ve felt) throughout the book that wouldn’t surprise me if she were somehow a descendant of Ravenclaw or another an ancient and powerful witch/wizard. Has anyone else had similar thoughts?