For a little more than two centuries, the Welsh fought the Normans, trying to keep them from totally taking the land of their fathers. This border warfare continued along the "Marches" until the time of Edward I, beginning 1272, when he decided that enough was enough, and began a campaign to take this wild west county. It is always difficult to keep all the players straight, so the following is a time line for the Norman(English) rulers, and the Welsh rulers:
Norman Kings \ Welsh Lords
William I (the Conqueror) - 1066-1087
Rhys ap Tedwy (Tudor) d. 1093
William II (Rufus) - 1087-1100
Henry I - 1100-1135
Gruffydd ap Cynan d. 1137
Gruffydd ap Ryhys d. 1137
Stephen - 1135-1154
Henry II - 1154-1189
Madoc ap Maredydd d. 1160
Owain Gwynedd d. 1170
Richard I - 1189-1199
Rhys ap Gruffydd (Lord Rhys) d.1197
John - 1199-1216
Henry III - 1216-1272
Llewelyn ap Iorwerth (the Great) d. 1240
Edward I - 1272-1307
Llewelyn ap Gruffydd d. 1282
The Normans were actually introduced to the Welsh around 1055 when Edward the Confessor used their assistance in fighting the Welsh under Gruffydd ap Llewelyn. Excellent references for this period of history are:
"England Under The Norman and Angevin Kings 1075 - 1225", by Robert Bartlett, Clarendon Press, Oxford, 2000.
"The Feudal Transformation 900 - 1200" , by Jean-Pierre Poly and Eric Bournazel, Holmes & Meier, London, 1991.
"The Normans", by Christopher Gravett & David Nicolle, Osprey Publishing, Ltd, Oxford, 2006.
"The Normans and the Norman Conquest", by Allen Brown, The Boydell Press, Suffolk, 1968.
"1066 The Year of The Conquest", by David Howarth, Dorset Press, a division of The Viking Press, 1978.
"The Bayeux Tapestry", by Simone Bertrand, ouest france, Rennes, 1978.
Isn't amazing that any of our JONES family survived!