Gertrude Eleanor Rosemary St. John (1910-1960) (1910–1960) Parents Evelyn Geraldine Russell Moubray St John, 19th Baron St John of Bletso Children Siblings Katherine Barbara St. John Margaret Beaufort St. John John St John, 20th Baron St John of Bletso Helen Evelyn St. John Sybilla Laura Russell St. John Partners Friedrich Max Hagedorn