While the most powerful ruler was acknowledged as King of the Britons (later Tywysog Cymru: Leader or Prince of Wales), and some rulers extended their control over other Welsh territories and into western England, none were able to unite Wales for long.
Mens den mægtigeste hersker var anerkendt som "konge af britonerne" (senere Tywysog Cymru: leder eller fyrste af Wales), og en del herskere strakte deres kontrol over andre walisiske territorier og ind i det vestlige England, var det ingen af dem, som formåede at forene Wales i længere tidsrum.