Cynthia Postan British horticulturalist (1918–2017) Parents Lady Judith Wynn-Carington Walter Keppel, 9th Earl of Albemarle Children Basil David Postan Alexander Henry Keppel Postan Siblings Derek Keppel, Viscount Bury Lady Cecilia Keppel Richard Keppel Walter Keppel Lady Anne-Louise Keppel Partners Michael Postan