Robert Darcy, 4th Earl of Holderness British diplomat (1718-1778) (1718–1778) Parents Frederica Mildmay, Countess of Mértola Robert Darcy, 3rd Earl of Holderness Children Amelia Osborne, Marchioness of Carmarthen Thomas Darcy, Lord Darcy and Conyers George Darcy, Lord Darcy and Conyers Siblings Lady Caroline Darcy George Schomberg Darcy Partners Mary Darcy, Countess of Holderness
