1. There is no single, common LaBarge ancestor.The St. Louis LaBarges (including Capt. Joseph) trace back to Robert Laberge through a different branch from my LaBarge ancestors in New England. 2. Virtually all LaBarges in North America are descended from Robert Laberge (as Lucien has noted). 3. The LaBarge spelling variation appears to have been adopted mostly in English speaking areas.It seems to be somewhat rare in Quebec.
For example, my great grandfather was born Antoine Laberge in Quebec.When he arrived in Massachusetts in the late 1800s, his name started showing up as LaBarge.He is buried in the same cemetary in Leeds, Mass. along with 3 of his brothers.Two of their tombstones have "LaBarge" and the other two are marked "LaBerge."