Career
He represented Richelieu in the Legislative Assembly of Lower Canada from 1820 to 1824. His surname also appears as Garau, Garault dit Saint-Onge and Gareau. He was born François-Étienne Saint-Onge in Contrecœur, the son of François Gareau and Élisabeth Dufaux, and settled in Saint-Ours.
Saint-Onge also served as justice of the peace and commissioner for the summary trial of minor causes.
He did not run for reelection to the assembly in 1824. Perrault died in Saint-Ours at the age of 60.
