THANK YOU! I knew I heard something implying that StarSwirl was a he, but given that I thought RD was a colt until "Suited for Success", I knew I could be mistaken...
It is also entirely possible that a magic backlash at some point caused StarSwirl to grow a beard even tough she was a mare. Making the title entirely apt. I mean, a great mare wizard that happens to have a beard... It's obvious history would call her XXX the bearded