All he is is someone I put on my ignore list awhile ago who then switched names.
I don't think the "Girdle of the Ancient One" was referring to that thing. There are plenty of creatures in Azeroth that are ancient and that's a fairly generic title. If it were to ever end up in WoW they'd give its race a name, like how Faceless Ones are actually N'raqi.
- - - Updated - - -
There is no "Hearthstone Lore". It's a card game that uses things from the Warcraft franchise.