Mary married John Montagu on 25 Apr 1772 in Hackwood, Hampshire, England. John (son of John (4th Earl of Sandwich ) MONTAGU and Dorothy FANE) was born on 26 Jan 1742 in St. George, Hanover Square, Middlesex, England; died on 6 Jun 1814 in Upper Wimpole Street, St. Marylebone, Middlesex, England. [Group Sheet] [Family Chart]

1. George John Montagu was born on 4 February 1773 in Huntingdon, Huntingdonshire District, Cambridgeshire, England; died on 21 May 1818 in Rome, Provincia di Roma, Lazio, Italy; was buried in Barnwell, East Northamptonshire Borough, Northamptonshire, England.
2. Francis Charles Montagu was born in 1774; died in Dec 1836 in Oxford, England.