I posted this on Twitter, but I think I should add it here just in case.
As of the Encyclopedia Eorzea Volume III, we have been left with only 1 picture that depicts a female Hrothgar, before there were 3.

This is the only mural that shows a female Hrothgar:




While these, depict Misija's Ancestor after her transformation into the Queen. The book paints it as Nevembya Votyasch transformed into a Hrothgarified version of her former self, something close to how Ysale, when turned into Shiva, gained a more Draconic appearance. So, not an actual female Hrothgar.