Kristin, Wow, I'm not having good luck with my computer lately.Just typed in a long message to you and it disappeared, so here we go again.
I haven't found anything about Joseph yet.I am still looking for my lost site that has amazingly complete records of Montreal; deaths, births, marriages.You can get some records for free and for some you have to be a member.I'll let you know when I find it.I did find my Xaintonge info and its really interesting.He was one of the original settlers with Cadillac.This information is from "Cadillac's Village or Detroit under Cadillac".It's in a list of the original inhabitants." Xaintonge. ?? When I first encountered this name it stood alone without any connecting names.I concluded it was an Indian name and so stated.Further investigation has led me to conclude that I was greatly mistaken and that the individual was named Pierre Gareau, dit St. Onge, and that the name St. Onge has been gradually changed to Saintonge and from that to Xaintonge."Later, there are 3 Gareaus listed."Gareau,(or Garro or Garraud) Dominique.Came Oct 3, 1708.He was born at Boucherville Jan 13, 1684.Gareau, Jean.Came Sept 25, 1707.He was born at Boucherville Nov. 3 (the date was cut off by my printer).Gareau, Pierre.Came as bargeman May 30 1705.He was born at Boucherville May 1 1673.He lived in St. Paul St. Montreal.He was sometimes called St. Onge, Saintonge or Xaintonge.The three Gareaus were brothers.Dominique and Jean never resided in Detroit, but came here together in 1708 and at various other times.Pierre owned a house and lot in the village, conveyed to him by the name of Xaintonge." The reason I remembered this is that a Richard St. Onge works with my husband. You probably have already seen this, but I'll mention it anyway.There is a Gareau family site at http://genealogie.org/famille/gareau/E_Gareau.htmhttp://genealogie.org/famille/gareau/E_Gareau.htm
There is a lot of information on it.It also mention variants of the Gareau name such as Garrow and Grow.Got to go listen to the debate now.Good luck.