Helen Mary Petre (died 1939) (d. 1939) Parents Mary Walmesley Henry Petre Children Siblings John Petre Mary Julia Petre Sebastian Petre Sybil Mary Petre Dorothy Mary Petre Mabel Mary Petre Robert George Petre Florence Mary Petre Francis Petre Oswald Arthur Petre Lucy Agnes Petre Partners Sir William Lawrence Young, 8th Bt.