Mary Bourne was born 1723 in (Calvert county+ Maryland) . She married Jacob Duvall (1715) 1743 .
Children
| Name | Birth | Death | Joined with |
| John Duvall (1745) | 1745 (Prince George,s county, Maryland) | 1787 (Potomac River+ Saint Marys+ Maryland) | Anne Roselle Philomena Tarleton (1748-1823) |
| Sinnett Duvall (1747) | |||
| Priscilla Duvall (1755) | |||