Deheubarth was a southern Welsh kingdom, arising from the former kingdoms of Dyfed and Seisyllwg in 920 AD, under the rule of Hywel Dda.   At various times, it fell under the auspices of Gwynedd, namely, during the rule of Gruffydd ap Llywelyn in 1055 AD.  The Norman conquest, as for the Saxons to the east, was not a happy event, however, and Deheubarth fell to them before 1100 AD.  These Normans conquered the southern regions of Wales more fully than they ever did the north, including Deheubarth (until 1282, at which point Edward I conquered all of Wales). The Normans accepted a client rule in certain instances and granted Cantref Mawr to Gruffydd ap Rhys in 1116. In time, he passed its rule onto his son, Anarawd.  With the help of Owain Gwynedd, Anarawd and Gruffydd successfully revolted against their Norman masters Read more…