Lord William FitzRoy British Member of Parliament (1782-1857) (1782–1857) Parents Elizabeth Wrottesley Augustus FitzRoy, 3rd Duke of Grafton Children Harriet Elizabeth FitzRoy Francis Horatio Fitzroy Siblings Lord John FitzRoy Isabella FitzRoy Augusta FitzRoy Elizabeth FitzRoy Lady Frances FitzRoy Lord Henry FitzRoy Lord Charles FitzRoy Georgiana Fitzroy George FitzRoy, 4th Duke of Grafton Partners Georgiana Raikes