William Fitzgerald British Member of Parliament (1793-1864) (1793–1864) Parents Emilia St. George William FitzGerald, 2nd Duke of Leinster Children Geraldine Sydney FitzGerald Siblings Charles Fitzgerald Isabella Charlotte de Rohan-Chabot Lady Elizabeth FitzGerald Lady Mary FitzGerald Lady Cecilia FitzGerald Augustus FitzGerald, 3rd Duke of Leinster Lady Emily FitzGerald Lady Olivia FitzGerald George FitzGerald, Marquess of Kildare