While searching for my own Leroux roots in the Quebec, Montreal and Chambly areas, I came across the Coulon-Courault family
The last of the French ancestors I know about is Pierre Courault, married to Jeanne Papot in St-Jacques de Poitiers, in the French region of Poitou
At least two of their children came to New France.
The first one is PIERRE COURAULT-COULON, b. 1630, m. Francoise Duval (a King's daughter arrived in Quebec in 1670, one of her sisters, Marie-Madeleine, will follow her in New France) on Nov.16,1671.Pierre died on May 4 and buried on May 5, 1680 at Beauport, near Quebec City. Here are some of their descendants:
1- Louis Courault-Coulon
b: Dec.17,1673 at Sillery, near Quebec City
m. Jan.10,1695 to Marguerite Martel
d. Dec.25,1699, at age 26
their son Francois Coulon-Courault, b. and bapt. Feb.11,1699, married Marie-Anne Burel on Jan. 10,1724, in Varennes, near Montreal
Francois and Marie-Anne had at least 2 children: Marguerite Coulon, m. to Pierre Lefebvre-Senneville on Nov.9,1752 and Anne Coulon-Courault, m. to Francois-Toussaint Jourdain-Lafrance, on Jan.30,1748, in Varennes. Marie-Anne Burel died on Nov.21,1732 in Longue-Pointe and was buried on May 4, 1733; this long delay may imply she was a victim of the wars with the Iroquois or victim of an epidemy of some sort.
2. Antoine Coulon-Courault dit St-Jean, m. to Geneviève Lalue, on Mar.19,1719, in Varennes. Their children: Marie Josephte, married to Pierre Rougeau-Berger on Jan.10,1746 and Louis Clerc Coulon-Courault, m. to Louise Lachambre on Oct. 18, 1756, in Varennes
The second child to cross the Atlantic was MARIE COULON-COURAULT, who married Isaac Bordeau Leroux from St-Constant, in the diocese of Poitiers. He was also known as Jean Leroux in the registries. They had a son, Antoine,(b. 26 and baptized on the 30th of Jan. 1723 in St-Joseph de Chambly, near Montreal; godparents: Antoine Menard and Marie Duluth) and a daughter Marie-Catherine Leroux, b. Sep.22,1725, baptized on Oct. 21,1725 in Chambly, godparents: Joseph Claveau-Langevin and Suzanne Laroche; she was buried on July 25, 1742, along with many other persons deceased on the same day)
This period of time was characterized by a strong fur trade with the Indian nations, many of our French people living in the Detroit area in what is now Michigan, or by an intense exploration period when many went to Louisiana and settled there under the French regime.
I hope having been of some help.
St-Jean-sur-Richelieu (near Chambly)
Province of Quebec, Canada