Kingdom of Gwynedd (Guynet)

The Aberffraw family's Llywelyns (also Llewelyn) in the 13th century; Grandfather, grandson, cousin. The Welsh Princes of Wales, and subsequent  internal  factions against fellow Welsh, and external rebellions against England. Then the eventual  demise of the Royal House of Aberffraw (Wikipedia links used). The Royal family of Aberffraw through warfare had controlled all of Gwynedd and most of North Wales by the 12th century. After the emergence of the Normans in Wales in the 11th century, the neighbouring kingdoms throughout Wales could not protect their lands as effectively as the Kingdom of Gwynedd had done. Deheubarth , Morgannwg , and Powys , the other three of the big 4 kingdoms lost swathes of land to the invaders. But, Gwynedd grew in size, reaching south along the coast into Meirionydd and Ceredigion and west north Wales to Powys. However, the gains were not achieved through peace but through war.  As well as the Aberffraw Llywelyns (anglicised as Leolinus...

Owain Lawgoch, and Owain Glyndwr, the 14th to early 15th century self-proclaimed Princes (King) of Wales (Wikipedia links used). In the Welsh language, Owain (Owen in English) is the name of the son of destiny. A reputation attributed to both of the self-proclaimed Princes of Wales in and around the turn of the 14th century. They were Lawgoch and Glyndwr. It was during the 14th century that the Royal House of Aberffraw finally finished. That was the final time that the Kings and Princes emerged from the former Kingdom of Gwynedd. The aspiring Princes from the 13th century were the final legitimate direct descendants of Welsh Royalty using the Welsh medieval custom of gavelkind, i.e. Llywelyn I & II, Dafydd II & III. The succession of male line descent (son of son) meant the final lineal successor to the House of Aberffraw  and the Kingdom of Gwynedd was Owain Lawgoch, albeit his grandfather renounced his rights to the crown. But, the Gwynedd family succession ended with him...