I have just started researching my mothers side of the family - John Laferriere (aka Lafeir & Lafeire) was my GGGGrandfather. The name has changed over the years and in different parts of the family. My mother's maiden name is spelled LaFear, which looks like it originated by John's grandson John in the early 1900s (in Bay City MI).
If you have any more info on him and Emma, I would love to share. Thanks - Jennifer