| Birth* | Guillaume Dufresne was born on 1 October 1676 at Ste Famille-IO, Montmorency, Québec, Canada. |
| He was the son of Pierre Dufresne and Anne Patin. |
| Christening | Guillaume Dufresne was christened on 17 October 1676 at Ste Famille-IO, Montmorency, Québec, Canada. |
| Marriage* | He married Geneviève Ruel, daughter of Clement Ruel and Marguerite Leclerc, on 12 November 1702 at St Laurent-IO, Montmorency, Québec, Canada. |
| Engagement | Guillaume Dufresne and Geneviève Ruel were engaged. |
| Marriage Contract | A contract for the marriage of Guillaume Dufresne and Geneviève Ruel was signed on 30 October 1702 at St Laurent-IO, Montmorency, Québec, Canada; Notary: Francois Genaple. |
| Death* | Guillaume Dufresne died on 28 December 1745 at St Laurent-IO, Montmorency, Québec, Canada, at age 69. |
| Burial* | He was buried on 28 December 1745 at St Laurent-IO, Montmorency, Québec, Canada. |
