Thomas FitzMaurice FitzGerald

Thomas FitzMaurice FitzGerald (c. 1175 – 1213) of Shanid, Lord of O'Connelloe, was the son of Maurice FitzGerald, Lord of Lanstephan. Thomas was the progenitor of the Geraldine House of Desmond, and brother of Gerald FitzMaurice, 1st Lord of Offaly, progenitor of the Geraldine House of Kildare.
In 1210, Thomas marched into Connacht with Geoffrey de Marisco at the head of a force of Anglo-Norman troops gathered in Munster, and of followers of Donnchad Cairprech Ó Briain, King of Thomond. This expedition aided in forcing Cathal Crobhdearg Ua Conchobair, King of Connacht into negotiations with John de Gray, Justiciar of Ireland.

Thomas FitzMaurice FitzGerald married Sadbh and had issue:

1. John FitzGerald, 1st Baron Desmond

• Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct, or Dormant. Volume III. London: George Bell & Sons. 1890. p. 83
• Burke, Bernard, A Genealogical History of the Dormant, Abeyant, Forfeited, and Extinct Peerages of the British Empire. London: Harrison. 1866. p. 204
• Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct, or Dormant. Volume III. London: George Bell & Sons. 1890. p. 83
• Burke, Bernard, A Genealogical History of the Dormant, Abeyant, Forfeited, and Extinct Peerages of the British Empire. London: Harrison. 1866. p. 204