Lady Margaretta FitzGerald (died 1766) (1729–1766) Parents Robert FitzGerald, 19th Earl of Kildare Lady Mary O'Brien Children Lady Charlotte Hill Emily Cecil, Marchioness of Salisbury Arthur Hill, 2nd Marquess of Downshire Siblings Richard Fitzgerald Frances FitzGerald Henrietta FitzGerald Mary FitzGerald George FitzGerald Catherine FitzGerald Anne FitzGerald William FitzGerald Elizabeth FitzGerald James FitzGerald, 1st Duke of Leinster Partners Wills Hill, 1st Marquess of Downshire