Meurig reunited his kingdom with Ergyng ( Archenfield ) by marrying Onbrawst the ruler of that kingdom .
Onbrawst is the daughter of Gwrgan Fawr ( the Great ) .
Meurig reunited his kingdom with Ergyng ( Archenfield ) by marrying Onbrawst , the daughter of Gwrgan Fawr ( the Great ) , the ruler of that kingdom .