Diarmait Mac Murchada - Death and Descendants

Death and Descendants

After Strongbow's successful invasion, Henry II mounted a second and larger invasion in 1171 to ensure his control over his Norman subjects, which succeeded. He then accepted the submission of the Irish kings in Dublin in November 1171. He also ensured that his moral claim to Ireland, granted by the 1154 papal bull Laudabiliter, was reconfirmed in 1172 by Pope Alexander III, and also by a synod of all the Irish bishops at the Synod of Cashel. He added "Lord of Ireland" to his many other titles. Before he could consolidate his new Lordship he had to go to France to deal with his sons' rebellion in 1173.

Ua Conchobair was soon ousted, first as High King and eventually as King of Connacht. Attempting to regain his provincial kingdom, he turned to the English as Mac Murchada had before him. The Lordship directly controlled a small territory in Ireland surrounding the cities of Dublin and Waterford, while the rest of Ireland was divided between Norman and Welsh barons. The 1175 Treaty of Windsor, brokered by St Lawrence O'Toole with Henry II, formalized the submission of the Gaelic clans that remained in local control, like the Uí Conchobair who retained Connacht and the Uí Néill who retained most of Ulster.

Diarmait's male-line descendants such as Art Mac Art continued to rule parts of Leinster until the Tudor conquest of Ireland in the 16th century. Today they live on with the surname "MacMurrough Kavanagh" at Borris in Co. Carlow and at Maresfield, East Sussex, being one of the few surviving "Chiefs of the name". The currently recognized chief of the name is William Butler Kavanagh, The MacMorrough Kavanagh, Prince of Leinster (b. 1944).