FitzGerald fought for James II in the Williamite War in Ireland (1688–1691) alongside his brothers John, Daniel of Ballyruddery, and Thomas of Ardglass.[2]
Their children were raised as Protestants. Their daughters married into the Herberts (twice), Merediths (twice), Sandes', Creaghs, Stacks, Hewsons, Collis', Rices and Days.
In 1708 FitzGerald conformed to the established religion.[10] His marriage, conversion, and the subsequent marriages of his children further alienated the Knights of Kerry from the local Catholic populace. FitzGerald became Deputy LieutenantofKerry.
FitzGerald died at Ballinruddery Castle, near Listowel, on 9 December 1729.
^Burke 1883, p. 406, right column, bottom. "... with 6 daus, Margaret, m. to Hugh O'Reilly; Ellen, m. to Sir Roger Shagnessy; Hornora, m. to John Fitzgerald, Esq., of Castleishen, and 2ndly to John Macnamafra, Esq.; Sarah, m. to Daniel Sullivan Bear; Mary m. _ Power of Doonil ..."
^MacCotter 2016, p. 27, line 32. "Maurice fought in the Irish army of James II along with his brothers, John, Daniel of Ballinruddery and Thomas of Ardglass."
^Burke 1879, p. 565, left column, line 37. "Maurice FitzGerald, Knight of Kerry m. [married] 30 June, 1703, Elizabeth, 2nd dau. [daughter] of David Crosbie, Esq. of Ardfert by Jane his wife, younger dau. [daughter] and co-heir of William Hamilton, Esq. ..."
^ abHickson 1872, p. 181, line 11. "... by whom he had three sons and nine daughters all married to Kerry gentlemen"
