|  Male John Duvall | 
| Birth | 20 Feb 1712 | Queen Ann Parish, Prince George's, Maryland, United States  | 
| Death | 1791 | Prince George's, Maryland, United States  | 
| Burial | ||
| Marriage | 23 Oct 1738 [1] | Queen Anne, Prince George's, Maryland, United States  [1]  | 
| Father | Mareen Duvall | F1537 Group Sheet | |
| Mother | Elizabeth Jacob | F1537 Group Sheet | |
|  Female Ann Fowler | 
| Birth | 14 Jun 1713 | Saint Barnabas Church, Queen Anne Parish, Prince Georges, Maryland  | 
| Death | 1791 | Queen Anne, Prince George's, Maryland, United States  | 
| Burial | ||
| Father | ||
| Mother | ||
|  Female Elizabeth Duvall | 
| Birth | 28 Aug 1739 | Frederick, Frederick, Maryland, United States  | 
| Death | 9 Mar 1783 | Frederick, Frederick, Maryland, United States  | 
| Burial | ||
| Spouse | John McGill | F4809 | |
| Marriage | 04 Dec 1759 | Prince George's, Maryland, United States  | 
|  Male Marsh Mareen Duval | 
| Birth | 17 Apr 1741 | Queen Anne, Prince George's, Maryland, United States  | 
| Death | 1794 | Anne Arundel, Maryland, United States  | 
| Burial | 
|  Female Susannah Duvall | 
| Birth | 19 Mar 1743 | Anne Arundel, Maryland, United States  | 
| Death | 2 May 1788 | Prince George's, Maryland, United States  | 
| Burial | 
|  Male Jacob Duvall | 
| Birth | 1748 | Prince George's, Maryland, United States  | 
| Death | 1800 | Prince George's, Maryland, United States  | 
| Burial | 
|  Female Mary Duvall | 
| Birth | 9 Jan 1750 | Prince George's, Maryland, United States  | 
| Death | 27 Jan 1842 | Prince George's, Maryland, United States  | 
| Burial | 
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