Later years Jolliet married Claire-Françoise Byssot de la Valtrie. Like Jolliet, she was Canadian born, a daughter of Francois Byssot de la Riviere and his wife Marie Couillard. Claire Francoise was also a sister of Louise Byssot de la Valtrie, wife of Seraphin de Margane, Seigneur de la Valtrie. In 1680, Jolliet was granted the Island of Antwhere by Louis XIV as a reward, where he created a fort and maintained soldiers. In 1693, he was appointed "Royal Hydrographer", and on April 30, 1697, he was granted a seigneury southwest of Quebec City which he named Jolliest.
Later years Jolliet married Claire-Françoise Byssot de la Valtrie Like Jolliet she was Canadian born a daughter of Francois Byssot de la Riviere and his wife Marie Couillard Claire Francoise was also a sister of Louise Byssot de la Valtrie wife of Seraphin de Margane Seigneur de la Valtrie In 1680 Jolliet was granted the Island of Antwhere by Louis XIV as a reward where he created a fort and maintained soldiers In 1693 he was appointed "Royal Hydrographer" and on April 30 1697 he was granted a seigneury southwest of Quebec City which he named Jolliest