Rhendall
The Earldom of Rhendall (or Rhenndall) is located in the mountain range of the same name in northwestern Gwynedd. Once known as the autonomous County of Rhorau, it is conquered by the joint forces of Eastmarch and Gwynedd in 906, at which point King Cinhil I Haldane creates the title as a secondary title to the Duchy of Claibourne, to be vested as a courtesy title in the ducal heir. Upon the death of Duke Graham I MacEwan of Claibourne in 948, his will passes the title to his granddaughter, Gillian MacEwan, who marries Sir Brion de Traherne in 957. Their descendants retain the title without interruption for over a century and a half. The fourteenth Earl of Rhendall, Earl Saer de Traherne, is the brother-in-law of Prince Nigel Haldane, and he is appointed to the Royal Council of King Kelson Haldane in 1122.
Read more about this topic: Earldoms Of Gwynedd (fictional)