After thus noticing the three tribes under which the supposed descendants of Coel were ranged, the descent of the Men of the North proceeds to give the pedigrees of those said to be of Roman descent. They are all deduced from Dyfnwal Hen, or the aged, who, in this document, is made the grandson of Macsen Guledig, or Maximus the Roman Emperor, but in the genealogies annexed to Nennius is said to be the grandson of Ceredig Guledig, whose ancestor Confer or Cynvor was the mythic father of Constantius, the father of the Emperor Constantine. These were obviously the Romani of the poem, and can be mainly traced in connection with the central districts of Annandale, Clydesdale, and Tweeddale. The principal race included among them was that of the provincial kings of Strathclyde, descended from Rydderch Hael, who is mentioned in Adamnan’s _Life of Saint Columba_ as reigning in Alclyde or Dumbarton, and whose history is so intimately connected with that of Kentigern, the great apostle of Strathclyde.[116] To the race of the Gwyddyl or Gaidheal the old Welsh traditions undoubtedly attach the Ffichti or Picts, to whom they invariably give the name of Gwyddyl Ffichti.[117] They occupied the small district extending from the Pentland or Pictland Hills to the river Carron, which was known to the Welsh as Manau Guotodin or Gododin, and to the Irish as the Plain of Manann, from whence they are said by Nennius to have driven out the sons of Cunedda, from whom the kings of North Wales were descended. They also possessed the larger district of Galloway, from the mouth of the Nith to the Irish Sea. This district takes its name from the term applied by the Welsh to its inhabitants, of Galwydel, from which the Latin form of Galwethia was formed;[118] and we find the name of Scoti Picti, which is obviously a Latin rendering of the Welsh term Gwyddyl Ffichti, applied by the author of the _Descriptio Albaniæ_, who was certainly a Welshman, to the Picts, who, Bede tells us, formed the population of the western districts north of the Clyde, afterwards known by the name of Arregaithel, before the Scots formed their settlement of Dalriada there. [Sidenote: Legendary origin of transmarine tribes.] For the legendary origins of the tribes of transmarine Scotland, or the districts north of the Forth and Clyde, we must, however, mainly look to Irish sources, and we find them pervading nearly the whole of the mythic history of Ireland, and cropping up here and there in the course of its artificial chronology. [Sidenote: The Nemedians in Scotland.]