Gerald FitzGerald, 1st Baron Offaly
From A Compendium of Irish Biography, 1878
FitzGerald, Gerald, 1st Baron Offaly, son of Maurice FitzGerald, was with his father at the siege of Dublin in 1171, and distinguished himself by his bravery in the sortie. After his father's death, he was induced to exchange with FitzAdelm de Burgh his castle of Wicklow for that of Ferns. In 1205 he sat in the Irish Parliament as Baron Offaly, and died the same year. His wife was Catharine, a daughter of Hamo de Valois, Lord-Justice of Ireland in 1197.
41. Biographical Treasury: Samuel Maunder, London, 1870. 41a