Returning from a visit to England in March 1599, prepared to accompany Robert Devereux, 2nd Earl of Essex in the war against Hugh O'Neill, Earl of Tyrone, he perished at sea with "eighteen of the chiefs of Meath and Fingall".
FitzGerald also succeeded to the title of 3rd Baron of Offaly on 1 August 1597.
- This article incorporates text from a publication now in the public domain: Webb, Alfred (1878), A Compendium of Irish Biography, Dublin: M.H. Gill & Son, endnote:
- Kildare, The Earls of, and their Ancestors: from 1057 to 1773, with Supplement: Marquis of Kildare. 2 vols., Dublin, 1858–1862
|Peerage of Ireland|
| Earl of Kildare