Hi Kim, I know this post is 5 years later, but this may help someone else who's looking for info.I'm a decendent of Jean Jacques LaFontaine, born 1748 at Vance Belgium, and who married Marie Therese Guillaume, born 1752.
JJ LaFontaine's son Jean Nicolas LaFontaine, born 1794, emigrated to the US with his wife Marie Lepage, born 1792, around 1841. They came through New York and eventually settled in Ohio.
I have a lot of information on this subject via an excellent genealogy book written by the Rev. Leo S. LaFontaine titled "The Story of the La Fontaine Family; Vance Belgium and Seneca County Ohio". If anyone is looking for information, email me. The book was published by Anundsen Publishing Co., Decorah, Iowa, in 1986.