Roger O'Shaughnessy

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Sir Roger O'Shaughnessy, The O'Shaughnessy (died 11 July 1690[1]), was Chief of the Name and a captain in the Irish army of James II of England. He was present at the Battle of the Boyne, dying ten days after at his castle in Gort. All his property was declared forfeit, and his son and heir, William O'Shaughnessy, was forced into exile. In 1697 Roger's estates were granted to Sir Thomas Prendergast, 1st Baronet, and the O'Shaughnessy family were never able to recover them.


Roger was the son of Dermot O'Shaughnessy.[1]

He married Helena, daughter of Conor O'Brien, a son of Donogh O'Brien, 4th Earl of Thomond. Her brother was William O'Brien.

Their children were:[1]

Roger O'Shaughnessy succeeded to the O'Shaugnessy lands in Ireland in 1678.[2]


  1. ^ a b c O'Donovan, John. The Genealogies, Tribes, and Customs of Hy-Fiachrach. Dublin: Irish Archaeological Society. 1844. Pedigree of O'Shaughnessy: pp. 372–91.
  2. ^ Lough Cutra, Galway, Castles in Ireland

Further reading[edit]

Preceded by
Dermott Ó Seachnasaigh
Lord of Cenél Áeda na hEchtge
before 1673 – 1691
Succeeded by
William O'Shaughnessy