The marriage act of Jean Guay with Jeanne is kept in the Quebec Basilica of Notre-Dame (Our Lady) registry. However this marriage was celebrated in Lévis, and worded as follows:

"On the 10^th of November 1652, after a third publication, on the 1^st, 8^th and 15^th of September, nobody objecting, Mr. De Saint-Sauveur priest in this parish, has interrogated Jean Guiet, son of Jean Guiet and Marie Dumont, his father and mother in the parish of Our Lady of Berneuil in Saintonge, and Jeanne Mignon daughter of François Mignon and Marie Bélanger her father and mother in the parish of Saint-Sauveur de LaRochelle, whom have given their mutual consent, he solemny married the couple celebrating a mass in Pointe Levy or Lauzon, Mr. Buissost and Cousture acting as their witnesses.

At that time, there was no church or chapel in Pointe Levy. The "Relations" for that period note that the first mass was celebrated on the south shore in 1647, at the home of Guillaume Couture, which was near the actual church of Saint-Joseph of Lévis. Throughout these early years, missionaries from Quebec served on this territory. Lévis will not have a resident priest until 1690.

The year 1652 was right at the beginning of the founding of Lévis and the nuptial mass of Jean Guay was celebrated in the house of Guillaume Couture, a former "Volunteer Servants". He and François Bissot, (who later on would be owner of the first tannery in Lauzon) acted as witnesses.

Jeanne Mignon, the bride, 16 years old, had come from Saint-Sauveur (Holy Savior) in LaRochelle in the Old French Province of l'Aunis. Aunis and Saintonge, LaRochelle and Berneuil were close to each other. Both families could have met over there. Some evidence of this can be seen in this phrase in the wedding act: "Who have given their mutual consent in the presence of the priest."

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