….From their stronghold in the hillfort near Newcastle Lyons in southwest county Dublin, the Mac Gilla Mo-Cholmoc clan had provided a number of the kings of Leinster during the eighth, ninth, and tenth centuries AD. However, they were beset by non-stop hostilities during the tenth and eleventh centuries , involving three rival north Leinster families, the Norse of Dublin and the Ui Cheinnselaig of Wexford and Carlow.The son of Muircheartach Mac Gilla Mo-Cholmoc was known for killing the royal heir of Tara, and was killed in revenge for his action. Muircheartach’s other son, also called Muircheartach, is recorded as giving endowments to the monastery of Tallaght. Diarmuid Mc Murchada viciously blinded him in 1141, to prevent him from being a rival for the throne of Leinster.
Furlong, Nicholas (1973) Dermot, King of Leinster and the Foreigners, Anvil Books, Tralee.
Gilbert, John Thomas (1861) History of the city of Dublin, J. Duffy, Dublin/London.
Smal, Chris (1993) Ancient Rathdown and St. Crispin’s Cell, A uniquely historic landscape. Friends of Historic Rathdown, Greystones.
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