René Allard married Marthe-Marie Gousset on 10 May 1734 and she gave him a son who received the names of Louis François.
In 1786, with his colleagues René Theulier and Louis Jousselin, he wrote and sent to the intendant, a memorandum on the status of the city and its ferruginous mineral waters, known as of Baths of Château-Gontier (fr).
[3] He signed the Tennis Court Oath on 20 June 1789 and he contributed to the night of 4 August 1789 (fr) (Abolition of feudalism in France).
On 9 July 1789 he was elected to the National Constituent Assembly and became a member of the Committee on Public Health (fr) established on the basis of an initiative of Joseph-Ignace Guillotin and presided over by himself.
Allard was a true patriot but liberal: he voted against the Civil Constitution of the Clergy.