We may not be that far apart. I have the wife's roots immegrating from France to Canada then Michigan. So perhaps it is not back to France we would have to go to find common ancestry, but just to Canada. What date do you have for the original immegration to the North American continent? I have early 1800's which makes it look as if your Ambrose may have been sibling or relation to Albert Amel b. 7 Mar 1792.