Mary Winifrede Petre (died 1947) (d. 1947) Parents William Petre, 12th Baron Petre Mary Theresa Clifford Children Siblings Katherine Mary Lucy Petre Eleanor Mary Petre Bernard Henry Philip Petre, 14th Baron Petre Margaret Mary Petre Philip Benedict Joseph Petre, 15th Baron Petre Theresa Mary Louisa Petre William Petre, 13th Baron Petre Frances Mary Petre Isabella Mary Petre Joseph Lucius Henry Petre Monica Mary Petre