Diarmait mac Máel na mBó (died 7 February 1072) was
King of Leinster
The kings of Leinster ( ga, Rí Laighín), ruled from the establishment of Leinster during the Irish Iron Age, until the 17th century Early Modern Ireland. According to Gaelic traditional history, laid out in works such as the ''Book of Invasion ...
, as well as
High King of Ireland (with opposition). He was one of the most important and significant kings in Ireland in the
pre-Norman era..
Background