My wife is a descendant of Jean Aubuchon and Jeanne Gille. She was born and raised in Prairie du Rocher, Randolph Co., Illinois, USA where parts of the Aubuchon family settled. There was a book, entitled "Randolph County, Illinois - Commemorative Edition - 1795-1995" that was compiled by the Randolph County Genealogical Society of Chester, Illinois in 1995. In it is the following entry from page 174. "AUBUCHON - Jean Aubuchon "dit" L'Esperance was born in Dieppe, Normandie, France about 1635. He was the son of Jean and Anne Gille, and half-brother of Jacques Aubuchon, "dit" LeLoyal, born 1617, son of Jean and Catherine Marchant, who put down roots in Canada about 1640."
The book's entry on the AUBUCHON family then goes on to discuss the subsequent generations of the family whose members (including three grandsons of Jean Aubuchon dit L'Esperance - Joseph, Pierre, and Antoine - sons of his son Joseph (b.19 Mar 1664)) - "journeyed to the Illinois country and are the ancestors of most of the AUBUCHONs in the Midwest - and their far flung descendants."