Career
Cloten married the princess of Brycheiniog and briefly united the two kingdoms. During Rhain"s rule, however, King Seisyll of Ceredigion invaded Dyfed and annexed its Cantref Ystrad Tywi (c 710). Ceredigion and Ystrad Towi were then merged to form Seisyllwg.
Sometime after this, the reduced Dyfed and Brycheiniog were briefly called Rhainwg.
