Ebor
The Earldom of Ebor is located north of the old capital city of Valoret, bordered to the east by the Lendour Mountains and to the west by the Purple March. It is created by King Festil III Furstán-Festil in 851 and he bestows it upon his close companion Sir Rhygan MacDinan, the youngest son of the last Sovereign Prince of Kheldour. However, Rhygan's descendants hold the land for only three generations, and Rhygan's grandson, Earl Gregory MacDinan, is attainted by the Regents of King Alroy Haldane as part of the wave of anti-Deryni sentiment that sweeps through the kingdom in 917. Gregory moves his family to the lands of Trevalga in The Connait shortly thereafter, and the title officially falls into abeyance. The House of MacDinan holds the title of Count of Trevalga for over two centuries before finally petitioning the Crown of Gwynedd for the restoration of their familial lands and titles. The request is granted by King Kelson Haldane in 1128, when he bestows the title of Earl of Ebor upon Count Saron MacGregor of Trevalga and grants him lands in the Duchy of Travlum.
Read more about this topic: Earldoms Of Gwynedd (fictional)