Kolvar
In Session 67: The Wizard's Cellar Report a partial book was found in the keep, titled: Lord of the End of Everything where it had a handwritten note:
(Handwritten notes near the name: Meklan of Toril? Meklan of Dierde? Me, of course Jacoby? Possible... Bargle of Mystara... Odd... Kolvar... died... reincarnated it seems... died again? Odd ...