Yes, I would agree that generally digging up clams is one of the hazards of digging. There is also a LaCroix who was a French 19th C. mathematician of note. At some point there are bound to be two or more plausible personages at which point neither one becomes just as plausible as either one. Such is the nature of history. It's not an exact science.
And then there is Pierre Maure and l'eglise de St. Pierre de Maure de Bretagne (Church of St. Peter in Maure, Bretagne), built in the 1890s. That one is also quite tenuous.
