He remained a member of the council with the title of Minister of State, and retained his parliamentary position as Président à mortier.
For five years he lived in exile at Maisons and at his residence at Glisolles, near the abbey of Saint-Pierre de Conches (Eure).
In 1656, Longueil married his daughter to the marquis de Soyecourt, who held an important court appointment, and began his return to royal favour.
[2] It is worth mentioning that in Montreal in 1668 (i.e. during René's lifetime), the son of an innkeeper and a resident of Longueil, Dieppe-born Charles le Moyne, was ennobled by Louis XIV, establishing the title of Baron de Longueuil.
With the coat of arms that he received, the resemblance to the one of the Parisian family is obvious and since a genealogical connection has yet to be established,[3] this design may have been made with René's acceptance or knowledge.