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Diarmait mac Áedo Sláine


Diarmait (died 665) was a son of Áed Sláine. According to the Irish annals he was High King of Ireland.

Diarmait's father Áed Sláine was a son of Diarmait mac Cerbaill, the apical ancestor of the southern branches of the Uí Néill kindred which dominated Ireland from the late 6th century until the rise of Brian Bóruma in the late 10th century. The descendants of Áed Sláine were known as the Síl nÁedo Sláine. With the possible exception of Óengus mac Colmáin, all Uí Néill kings descended from Diarmait mac Cerbaill belonged to the Síl nÁedo Sláine until the death of Cináed mac Írgalaig in 728. The Síl nÁedo Sláine were Kings of Brega and the Hill of Tara, where High Kings were inaugurated, lay within their lands. Other groups descended from the sons of Diarmait included Clann Cholmáin, or more precisely Clann Cholmáin Már, descended from Colmán Már, which replaced the Síl nÁedo Sláine as the dominant group of the southern Uí Néill from the middle of the 8th century, and the less important Caílle Follamain or Clann Cholmáin Bicc, descended from Colmán Beg.

Áed Sláine himself is said to have been High King jointly with Colmán Rímid of the northern Cenél nEógain branch of the Uí Néill, following the death of Áed mac Ainmuirech. Áed Sláine died circa 604, a death said to have been prophesied by Saint Columba. Áed's sons are said to have included Diarmait, Blathmac (died 665), Congal (died 634), Ailill (died 634) and Dúnchad (died 659).


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