Glywys
Glywys is a legendary early 5th century Welsh king, an important character in early Welsh genealogies as the eponymous founder king of Glywysing, a southeast Welsh kingdom whose heartland lay between the Tawe and the Usk. In one genealogy Glywys is reckoned the eldest son of Solor, son of Mor. He is said to have married Gwawl, the daughter of Ceredig of Ceredigion: one legend states they had twenty two children, all male bar one, including the churchmen Pedrog and Edelig. According to twelfth century sources, after the death of Glywys the kingdom was divided into three cantrefi, Gwynllwg, Penychen and Gorfynydd, by his sons  Gwynllyw father of Cadoc, Pawl and Merchwyn respectively, though Glwysing still existed and would later become Glamorgan. Gwynllyw gave his name to Newport Cathedral and also to Wentlooge.