Travlum

Travlum or Transflumenia. This region is generally considered to be the land between the River Eirian, the River Llanarfon, the Mughdorna. Mountains, and the city of Cùilteine.  It was conquered by the Byzantyun Empire in the year 260, but was lost by them about 90 years later.  The title of Duke of Travlum was awarded to several members of the House of Haldane in the last century, but is not currently in use.
Dukes of Travlum
House of Haldane 
Alroy Uthyr (son of King Urien) - 1000-1001
Ossian Albert (brother) - 1017
Jaron Rhys (brother) - 1025-1078
Tamarina (daughter) - 1078
(Source: Codex Derynianus)
Category:Duchies of Gwynedd