Map from Journal of Royals showing Mac Gilla Mo-Cholmoc strongholds at Rathdown and Newcastle Lyons near Kildare border.
Courtesy of C. Love
De Riddlesford family, intertwined with the Earls of Kildare.
Journal of the Archeological Society of the County Kildare and surrounding Districts, 1896-1899, Edward Ponsonby, Dublin 1899, Page 7.
Kilkea Castle, Kildare, built by Walter de Riddlesford. Walter's daughter inherited Kilkea, and later married Maurice Fitzgerald
Castles of Ireland ; Some fortress Histories and legends, C.L. Adams, E. Stock (publisher), London, 1904, page 221.

It was crystal clear to the Mac Gilla Mo-Cholmoc family that their fate depended on maintaining good relations with whoever should control Dublin.

The Mac Gilla Mo-Cholmocs lost their stronghold at Liamain, near Newcastle Lyons, and two cantreds (divisions of a county) south of Dublin. However, they were permitted to retain most of their lands, exchanging their deference towards the Dublin Norse and Diarmait Mac Murchada for submission to King Henry II, and were treated thereafter no differently from any other element of the conquering Norman aristocracy.


Strongbow gave the Manor of Bray, and large areas of land in county Kildare to Walter de Ridlesford. This resulted in the displacement of the original native land owners, – the O’Byrnes and O’Tooles – who were banished to areas around Glendalough and Glenmalure in the Wicklow mountains.

Smal, Chris (1993) Ancient Rathdown and St. Crispin’s Cell, A uniquely historic landscape. Friends of Historic Rathdown, Greystones.


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