Lady Mary Agar (1901-1975) (1901–1975) Parents Lady Amy Byng Sidney Agar, 4th Earl of Normanton Children Anthea Pretyman John Pretyman Siblings Edward Agar, 5th Earl of Normanton Lady Rosemary Agar Lady Diana Agar Lady Amy Agar Lady Alexandra Agar Lady Caroline Agar Lady Georgiana Agar Partners Herbert Pretyman