Diarmait mac Máel na mBó (died 7 February 1072) was
King of Leinster, as well as
High King of Ireland
High King of Ireland ( ) was a royal title in Gaelic Ireland held by those who had, or who are claimed to have had, lordship over all of Ireland. The title was held by historical kings and was later sometimes assigned anachronously or to leg ...
(with opposition). He was one of the most important and significant kings in Ireland in the
pre-Norman era..
Background