From the beginning of his involvement with the companions of Frédéric Ozanam, Jean-Léon Le Prevost was certainly already very marked by the life of Monsieur Vincent because, on February 4, 1834, he proposed to the Conference of Charity to take Saint Vincent de Paul as boss. The proposal is accepted. It is therefore natural that when founding his Congregation, which initially wanted to be at the service of the works of the Conference, Monsieur Le Prevost chose to place himself under the patronage of the same Saint Vincent de Paul.
It was probably in 1847, faced with the difficulties inherent in still recent life together, that Monsieur Le Prevost and Abbé Beaussier suggested taking Saint François de Sales as secondary patron of the Congregation, in order to inspire all the relationships with the neighbor and in works. We owe the spirit and family life to this patron saint; he is a model of love, kindness, wisdom and gentleness.