Sir Gerald Fitzgerald, 3rd Lord Decies was the son of John Fitzgerald and Ellen, daughter of Maurice FitzGibbon, the White Knight, and was the third of the Lords of Decies.

The Decies property was originally a part of the Desmond estate until James, the 8th Earl of Desmond

Earl of Desmond

The title of Earl of Desmond has been held historically by lords in Ireland, first as a title outside of the peerage system and later as part of the Peerage of Ireland....

, bequeathed to his younger son, Gerald, Decies and Dromana Castle.

Sir Gerald Fitzgerald married Ellice, daughter of Piers Butler, 8th Earl of Ormond and had issue:

• Sir Maurice Fitzgerald
• Sir James Fitzgerald
• Gerald Fitzgerald
• Mary, who married Sir Oliver Grace

Ancestry