Tomas ap Rhodri ab Owain Gwynedd was the only known son of Rhodri ab Owain Gwynedd

Rhodri ab Owain Gwynedd

Rhodri ab Owain Gwynedd was prince of part of Gwynedd, one of the kingdoms of medieval Wales. He ruled from 1175 to 1195.On the death of Owain Gwynedd in 1170, fighting broke out among his nineteen sons over the division of his kingdom...

 ruler of half Gwynedd

Gwynedd

Gwynedd is a county in north-west Wales, named after the old Kingdom of Gwynedd. Although the second biggest in terms of geographical area, it is also one of the most sparsely populated...

 from 1170–1195. In the 17th century, Sir John Wynn, 1st Baronet of Gwydir

Gwydir

Gwydir may refer to:Australia*Gwydir Highway, New South Wales*Gwydir River, New South Wales*Division of Gwydir, electoral divisionUnited Kingdom*Gwydir Castle, Conwy, Wales*Gwydir Forest, Conwy, Wales...

 claimed and later proved his ancestor was Tomas ap Rhodri, however the Wynn family expired in the male line by the middle of the 18th century. A surviving line of male line descendants of Tomas ap Rhodri are the Anwyl of Tywyn Family

Anwyl of Tywyn Family

Anwyl of Tywyn are a Welsh family who trace their descent to Owain Gwynedd. They claim direct patrilinear descent from Owain, who was King of Gwynedd from 1137 - 1170 and a scion of the royal House of Aberffraw...

.