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Post-Roman Celtic Kingdoms

Celts of Cymru

 

 

 

View Map of Celtic Britain Gwerthrynion (Guorthigirniaun)

This tiny principality or region was located to the north of Builth. It seems to have been part of Vortigern's ancestral lands, and bears his name in its Welsh form.

Initially part of Vortigern's Powys, it was governed entirely by Builth and subject to its rule. Its rulers were the same of those of Builth itself, all of whom could trace their descent to Vortigern, but information on the principality is extremely patchy.

c.406 - c.760

Ruled directly from Builth.

by 800

The kingdom ceases to exist, being absorbed by Seisyllwg and then Deheubarth.