The Meaning and Origin of Cajun French Last NamesBreaux - Of French origin meaning "those trusted with immense responsibilities". Gauthreaux - Of French origin meaning "someone in a position of power in the medieval French army". Faucheaux - Of French origin meaning "someone who mows lawns of the aristocrats". Doucet - Of French origin used to describe "someone who is gentle natured, sweet and pleasant". Barrilleaux - Of French origin meaning "someone for whom family is most important".