Brun was born in La Chaussee, Vienne, France and emmigrated to Acadia in 1648 with his wife Marie-Renee Brault, sister of Vincent Brault (see above). Brun and Marie-Renee had married in 1644 in France.

Some authors give 2 wives for Vincent Brun, One Vincende Brault, whom he marries about 1642 and is the mother of Madeleine, and then Renée Brault, who is the mother of the rest. Both are supposed to be born in France according to most sources I can locate at this time. The explanation is that they appear to be sisters.