Compagnie de la Nouvelle-France
The son of René Legardeur de Tilly and Catherine de Cordé, he was born at Thury-Harcourt in France and came to Quebec City in June 1636, arriving with his mother, his sister Marguerite, the wife of Jacques Leneuf de La Poterie, and his brother Charles Legardeur de Tilly. Legardeur helped found the Communauté des Habitants, who took over the fur trade monopoly from the Company of One Hundred Associates. In 1647, he obtained the seigneuries of Repentigny and Bécancour.