The information I have on Jean Poulin and Marie Belleavance dit Gange is totally different from what you have.
Jean Poulin born cir. 1690, married Marie Belleavance dit Gange on November 22,1726 in Rimouski, Quebec. Marie was born on February 18, 1703. She was daughter of Alexis Belleavance/Gange and Catherine Cloutier. Jean was son of Jean Poulin and Anne Robin. Jean and Marie's children were:
Jean-Francois born Dec 2, 1727 in Rimouski, Que.
Joseph Poulin born Dec 12, 1729 in Rimouski, Que
Agnes Poulin born May 31, 1733 in Rimouski, Que
Jean-Baptiste Poulin born April 30,1735
Joseph Poulin born July 20, 1736 died March 6, 1737 in Rimouski,Que
and a Charlotte Poulin born on July 13, 1740 marrying Francois Morin Feb. 16, 1757 in Rimouski, Que...there is no mention of a Madeleine. Also if they married in 1702 that would mean Jean was only 12?