Hey Cory, that's one huge rabbit hole you're headed down there... but that's the fun part, right? It's most commonly spelled 'Dormarch' but also 'Dormarth' (which literally means 'Death's Door'... Probably a similarity here to the Greek 'Cerberus'). Most notable mention is in 'The dialog of Gwyn and Gwyddno' in the Black Book of Carmarthen. Good luck in your hunt for the leader of the Wild Hunt's pack.

@@AwarenessShop thank you so much!