Hywel ap Cadell : c880 - 950. Known as Hywel Dda ( Hywel the Good) was a King of Deheubarth who eventually came to rule most of Wales. Hywel is highly esteemed among other medieval Welsh rulers, his name is particularly linked with the codification of traditional Welsh laws, which were known as the laws of Hywel Dda. The latter part of his name ( Dda - Good ) refers to the fact that his laws were just and good, being of compassion rather than punishment, plenty of commonsense and recognition of