At the founding of the parish of Saint-Adelphe, canonically erected in 1885, Louis-François Richer Laflèche, Bishop of Trois-Rivières wanted to pay tribute to the priest of Sainte-Anne-de-la-Pérade (1852-1882), Edward Louis-Adolphe Dupuis (1823-1893), who had marked the location of the church.

Considering that the Roman martyrology not count Saint-Adolphe, he chose Saint-Adelphe, bishop and confessor, whose religious festival is celebrated on 29 August, and whose name differs only by a vowel.

This explanation, advanced by Pierre-Georges Roy, seems ill explain whereas at least one saint named Adolphe Adolf of Osnabrück (1216-1224).

In 1860, there were a few settlers, including Veillette, Asselin, Carpentier, Thivierge, Lambert, Baillargeon, Charest, Gervais, Perron, Lafontaine, Baribeau and Lavigueur dit Brouillet.

During the civil foundation in 1891, the parish of Saint-Adelphe has 56 established families (in addition surnames identified in the 1860s): Ayotte, Boisvert, Bordeleau, Brosseau, Cardinal, Cossette, Side, Francoeur, Gauthier, Germain, Hamelin, Mongrain, Roberge, Sauvageau, St-Arneault, Tiffault.