Tigernán Ua Ruairc

Mac Murchada's subsequent recruitment of Marcher Lords to assist him in the recovery of his Kingdom of Leinster ultimately led to the Norman invasion of Ireland.

On this occasion he was allowed to remain in Ireland, but was forced to pay one hundred ounces of gold to Ua Ruairc for the kidnapping of Derbforgaill (thus proving under Brehon law that the abduction of his wife was unlawful) and submit and give hostages to Ruaidhrí.

[11] It wasn't until the arrival of Robert Fitz Stephen, Hervey de Montmorency, Raymond le Gros and eventually Strongbow himself that Mac Murchada met with success.

[13] In response, the Annals of Tigernach state that he persuaded Ruaidhrí Ua Conchobair to execute hostages he had taken from Mac Murchada the previous year.

[15] According to Giraldus Cambrensis, Ua Ruairc was one of the Kings of Ireland who submitted allegiance to Henry II after his arrival to assert control over Strongbow in 1171.

[18] The Annals of the Four Masters, which claims that his death was at the hands of de Lacy and Domhnall states that he was 'a man of great power for a long time'.