Flaithbertach was born in 0976. Flaithbertach's father was Muircheartach O'NEILL. His paternal grandparents were Domnall O'NEILL and Mor ingen Tadhg. He was an only child. He died at the age of 60 in 1036.
General Notes
Also Known As:<_AKA> An /Trostan/ Called Flaitherbertach of the Pilgrim's Staff. He abdicated his throne to his son and went on a pilgrimage to Rome; however, his son was killed in battle so he resumed his title. He was in constant battle with Brian Boru, the usurping King of Ireland and ancestor of the O'Briens