Career
Another brother, Joseph François Augustin Monneron (1756–1826) was député for Paris at the Legislative Assembly and retired from it in 1792, before becoming Director General of the Caisse des Comptes Courants and going bankrupt in 1798. Entering the École du génie de Mézières and received as an engineer on 1 January 1770, he was first employed in France, at Briançon then Saint-Omer. Participation in Lapérouse"s expedition
Lapérouse proposed Monneron to Fleurieu as the expedition"s chief engineer, for "such a character joined to knowledge is that which convened in him".
Moneron Island discovered by the expedition was named after him.