Based on the fact that all we know about M.G. McGonagall is that they're a seeker on the Gryffindor Quidditch team, and I've not seen a single headcanoned name given to them that didn't use Gwendolyn as the middle name, can we say Gwendolyn Morgan, famous captain of the Holyhead Harpies, who would be around the same age as Minerva, Malcolm and Robert Jr., is their mother? And that, much like when Minnie married, Gwen just kept her surname. Don't know who M.G.'s dad should be though.








