Dermot McMurrough definition of Dermot McMurrough in the Free Online Encyclopedia.

Dermot McMurrough or Diarmiud mac Murchada (both: dûr`mət məkmŭr`ə), 1110–71, Irish king of Leinster. He became involved in a complicated feud, partly because he abducted a neighbor's wife, and in 1166 was defeated and banished by the High King Rory O'Connor O'Connor, Rory or Roderick, 1116?–1198, last high king of Ireland. He became king of Connacht in 1156 and seized the high kingship in 1166.
..... Click the link for more information. . Dermot appealed for help to Henry II of England, who refused him direct support but allowed him to enlist a force led by Richard de Clare, 2d earl of Pembroke Pembroke, Richard de Clare, 2d earl of, d. 1176, English nobleman, also known as Richard Strongbow.
..... Click the link for more information. , and other Norman barons in Wales. After Pembroke had invaded (1170) and won much of E Ireland, including Dublin, he married Dermot's daughter, Eva. He was a patron of the compilation of the valuable Irish manuscript, the Book of Leinster.