Are you looking for info on Mary Piech (nee Peacosh)?
I don't have anything on Andrew Piech, but I've got info on Nick Peacosh, Mary's father.
I sent a little bit to your cousin, Herve & Lyne but I've got more. If you can access my tree, Peacosh_April24_2014, you'll get some info. Nick had 2 brothers and one (possibly two) sisters.