| Father | Joseph Pépin Dit Lachance (1709 - 1770) |
| Mother | Marquerite Feuilteau (1718 - 1781) |
| Sibling | Michel Lachance (1738 - 1738) |
| Sibling | Marie Anne Pépin Lachance (1740 - 1795) |
| Sibling | Marie Josephe Pépin (1741 - 1806) |
| Sibling | Jean Charles Pépin (1743 - 1798) |
| Sibling | Louis Pepin dit Lachance (1745 - ) |
| Sibling | Marie Louise Pepin (1748 - 1748) |
| Sibling | Augustin Pepin Dit Lachance (1753 - 1839) |
| Sibling | Marie Josephte Pepin (1755 - ) |
| Sibling | Marie Genevieve Lachance (1758 - 1758) |
| Sibling | Marguerite Pepin Dit Lachance (1761 - 1837) |