He married his first wife, Marie-Barbe Hoyau (widow Munster), in November 1766. She died at the Hôtel-Dieu on 11 March 1782. Simon remarried Marie-Jeanne Aladame on 20 May 1788, in the parish of Saint-Côme-Saint-Damien. Marie-Jeanne (born on 25 June 1746, in Saint-Étienne-du-Mont parish, Paris) was a servant and the daughter of Fiacre Aladame (a carpenter) and Reine-Geneviève Aubert. She came to wider attention during the storming of the Tulleries Palace in 1792, for having diligently nursed wounded republicans. Marie-Jeanne outlived her husband and died in Paris in 1819 at the "Hospice des Incurables".