In the region between the Hadrian's wall and the Forth in ancient times there reigned 13 kings over 13 Clans before they were united by Kenneth MacAlpine the King of Pictish Dalriada and founder of a new dynasty. Further north lived the Picts and further south were 5 british kingdoms of Angles and Saxons.

Gaithel Glass first King of Scotland, progenitor of all later kings and the people itself

ORKNEY
Arguth
Loth
Gawain ca. 470 nephew of King "Artus" (welsh: Gwalchmai) by his sister Morgause, son of Loth

DALRIADA (Oirer Ghaideal = Argyll), pictish kingdom refounded around AD 500 from the Forth of Clyde in the south to the Drumalban in the east
(Erc) (King of Ireland)
Fergus Mor
mac Erc		 Fergus the Great son of Erc leads the tribes of the Dal Riata (Ireland) in the foundation of Dalriada in answer to rival dynastic pressures in northern Ireland. His brothers Loarn and Angus aided him in reigning
Bruide