Tewdr Brycheiniog, Kings of Brycheiniog
Tewdr Brycheiniog was grandson of King Elisedd. He lived in the early 10th century at a time when Brycheiniog appears to have lost some of its independence to the domineering Kingdom of Deheubarth, under Hywel Dda. He held court in the middle of Llyn Syfaddan (Llangorse Lake) on the only known crannog (artificial island dwelling) to have been discovered in Wales. It was a short lived Royal Residence, being established around 900, yet destroyed by raiding Englishmen sixteen years later. They forced their way into the Royal presence and made of with both the Queen of Brycheiniog and thirty-three of her courtiers. Tewdr's name appears as a signatory on English Land Charters from King Athelstan's reign (934).