He married Geneviève, the daughter of Paul-Joseph Le Moyne de Longueuil, in 1753.
In 1769, his wife acquired the seigneury of Isle-aux-Grues, Île aux Oies and adjacent islands.
[1] When the American invaded Quebec, Beaujeu raised a relief force of 150 men, but his advance guard were captured at Michel Blais' house in the Battle of Saint-Pierre.
[1] After experiencing financial difficulties, Beaujeu sold part of the seigneury, two small islands known as the fief of Grandville, in 1789.
[1] His son Jacques-Philippe Saveuse de Beaujeu was a member of the Legislative Council of Quebec.