Lady Mary Bertie (died 1826) (1746–1826) Parents Willoughby Bertie, 3rd Earl of Abingdon Anna Maria Collins Children Thomas Stapleton Siblings James Bertie, Lord Norreys Peregrine Bertie Lady Sophia Bertie Willoughby Bertie, 4th Earl of Abingdon Lady Elizabeth Bertie Lady Jane Bertie Lady Bridget Bertie Partners Miles Stapleton