Dafydd ab Owain Gwynedd (died 1203) was Prince of Gwynedd from 1170 to 1195. He was the son of Owain Gwynedd by Cristin verch Goronwy. For a time he ruled jointly with his brothers Maelgwyn ab Owain Gwynedd and Rhodri ab Owain Gwynedd. Gwynedd was one of the kingdoms or principalities of medieval Wales. ...

Upon the death of Owain Gwynedd in 1170, his sons fell into dispute over lordship of Gwynedd. Together, Dafydd and Rhodri attacked and killed their brother Hywel that same year. Dafydd drove out Maelgwn in 1173, sending him fleeing to Ireland. Another brother, Cynan, died in 1174, removing one more contender for the throne. Gwynedd is an administrative county in Wales, named after the old Kingdom of Gwynedd. ...

Dafydd married Emme of Anjou, the half-sister of King Henry II of England, in summer 1174. Emme was an illegitimate daughter of Geoffrey of Anjou. They had four children: Owain, Einion, Gwenllian, and Gwenhwyfar. Henry II of England, depicted in Cassells History of England, Century Edition, published circa 1902 Henry II (March 5, 1133 – July 6, 1189), ruled as Duke of Anjou and as King of England (1154–1189) and, at various times, controlled parts of Wales, Scotland, eastern Ireland, and western France. ... Geoffrey V (August 24, 1113 - September 7, 1151), Count of Anjou and Maine (province of France), and later Duke of Normandy, called Geoffrey the Fair or Geoffrey Plantagenet, was the father of King Henry II of England,and thus the forefather of the Plantagenet dynasty of English kings. ...

In 1175 he captured his brother, Rhodri ab Owain Gwynedd. Rhodri escaped however, and the two brothers continued to vie for lordship. In 1194 Dafydd faced his nephew, Llywelyn Fawr, who drove him from most of his possessions and imprisoned him in 1197. He was released a year later thanks to the efforts of Hubert Walter, Archbishop of Canterbury. Dafydd retired to England, where he died in May 1203. Emme died in or after 1214, when she disappears from the Pipe Rolls. Llywelyn ap Iorwerth ( 1173–April 11, 1240) was a Prince of Gwynedd. ... The Archbishop of Canterbury is the most senior bishop of the state Church of England and of the worldwide Anglican Communion, outranking the other English archbishop, the Archbishop of York. ... The Pipe Rolls are a series of financial records from England, beginning in 1130 and lasting, mostly complete, until 1833. ...

The Chronicle of Ystrad Fflur (http://www.webexcel.ndirect.co.uk/gwarnant/hanes/chronicle/chroniclearglwyddrhys.htm)

Gwynedd was one of the kingdoms or principalities of medieval Wales. ... Llywelyn ap Iorwerth ( 1173–April 11, 1240) was a Prince of Gwynedd. ...