I am a decendant of the Group of Nine Arseneaus that settled in Beaverville, Iroquois County, Illinois. A good source of information would be either the KKK Public Library or the Iroquois County Genealogical Society. My grandmother, who was an Arseneau, passed away on 4/9/99 in Kentucky. I have been looking into my Arseneau lineage for awile. There is also a microfilm available from the Mormons or at the Iroquois County Gen. Society that list Arseneau's back until the 1640's in Canada. There are alot of us out there. I'm not sure on your lineage though. I don't know of a link between the Arseneau's of Beaverville and the Arseneaus of Bourbonnais, but there must be one. Good luck with your search.