John (10th Duke of Marlborough) died aged 74 years. Mary (Duchess of Marlborough) died aged 61 years.
Ask an expert about your family tree
Want to dive deeper into your family tree? Begin with a free quote for a family history research package offered by Legacy Tree - an independent genealogy service.
BillionGraves.com record for John Albert Edward William Spencer-Churchill (11 March 1972), BillionGraves Record St Martins Church, Bladon, Bladon, Oxfordshire, England, United Kingdom, Europe