CADWALLON

also spelled Caedwalla, or Cadwalader died 633 British king of Gwynedd (in present north Wales) who, with the Mercian king Penda, invaded Northumbria in 632, killed the Northumbrian king Edwin in battle, and devastated the region. A year later Cadwallon was defeated and slain by Oswald, who became king of Northumbria.