Career
According to tradition, Cadwallon ruled during, or shortly after, the Battle of Mons Badonicus, and King Arthur"s victory over the Saxons (in either the early 490s or the mid 510s). Cadwallon"s name is not connected with the legendary battle, but he may have benefitted from the period of relative peace and prosperity throughout Britain that it procured. Cadwallon"s epithet, Lawhir, may possibly refer to him having longer than usual arms or might also be a metaphor, referring to the extent of his authority.
The late medieval poet Iolo Goch claims that he could "reach a stone from the ground to kill a raven, without bending his back, because his arm was as long as his side to the ground."
Number clear evidence exists as to who this "lost king" might be (assuming, of course, that Gildas"s account is reliable), but some have suggested the name of Owain Ddantgwyn as the unfortunate heir/victim.