Louise Bernier was born on 3 July 1712 at Cap-St-Ignace. She was the third generation of Bernier in the country. Her paternal grandfather, Jacques, known as Jean de Paris, came to New-France in 1651. Louise was the daughter of Jean-Baptiste Bernier and Geneviève Caron. However, she hardly remembered her father as she was just three years old when he died. She grew up in Cap-Saint-Ignace with her mother and her second husband, Jacques Rodrigue, on the last property at the end of Du Rocher Road. In the 18th century, that property was adjacent to the Seigniorial domain.

Louise Bernier most likely met her husband, Alexandre de Kervoack, in 1730 or 1731. At the time, Alexandre le Breton while doing business along the St. Lawrence south shore, the region known as Côte-du-Sud, was in contact with a Côté family whose head was Seigneur de L’Isle-Verte. Three of the Seignior's sons had married three of Louise Bernier’s sisters between 1720 and 1722.

When her husband died on 5 March 1736, Louise Bernier, like many widowed women then, found herself in dire need given that the couple was not rich. Therefore, on 23 July 1736, she had to retro-cede her share of the land known as des Trois Ruisseaux (The Three Creeks), located in Notre-Dame-du-Portage bought by the couple in July 1734. Three years later on 24 January 1739, unable to pay the mortgage due, and as tutor to her children, she had to retro-cede their share of the land.

Louise Bernier never remarried after her husband's death; all the same she gave birth to another son, Raphaël, on 14 May 1741. However, he lived less than a year and died the following January.

Louise inherited some land from her mother in April 1746, and ten years later, she established her son Louis on that property in L’Islet. Louise lived with her youngest son until he died in 1779. After that date there are no records allowing us to know what happened to her. Perhaps, and most likely, she kept living at the same place.

Louise Bernier died at the grand old age of 89 years and eight months on 25 March 1802 so she had the chance to know many great-grandchildren. The next day she was buried in Cap-Saint-Ignace.

Her longevity allowed her to convey to three generations of her descendants all the love and pride she felt for the husband she knew for only four short years.