| Father | Nicolas Demers Dumais (1696 - 1760) |
| Mother | Marie Cadieux (1704 - ) |
| Sibling | Michel Demers Dumais (1738 - 1790) |
| Sibling | Gabriel Archange Demers Dumais (1749 - 1749) |
| Sibling | Antoine Demers Dumais (1730 - 1761) |
| Sibling | Pierre Joseph Demers Dumais (1733 - 1756) |
| Sibling | Marie Madeleine Demers Dumais (1734 - 1734) |
| Sibling | Nicolas Demers Dumais (1744 - 1744) |
| Sibling | Genevieve Demers Dumais (1743 - 1743) |
| Sibling | Jean Baptiste Demers Dumais (1745 - ) |
| Sibling | Marie Genevieve Demers Dumais (1747 - 1828) |
| Sibling | Marie Therese Demers Dumais (1725 - 1743) |
| Sibling | Jean Baptiste Demers Dumais (1739 - 1739) |
| Sibling | Pierre Demers Dumais (1741 - 1797) |
| Sibling | Marie Madeleine Demers Dumais (1736 - 1792) |
| Sibling | Nicolas Demers Dumais (1728 - 1742) |