According to the records that I have, The marechal's father (Frederic Forey, born 1773) was one of eleven children born to Jean Forey (who was one of 15 children born to Thomas Forey and Catherine Marlien) and Anne Savolle.The children of Jean and Anne were:
Catherine: born 10/8/1754 Louis: born 25/8/1755 Jacques: born 15/11/1756 Magdeleine: born 29/1/1758 Antoine: born 24/4/1759 Antoinette: born 15/10/1761 Marie: born 15/4/1764 Charles: born 4/5/1765 Antoinette: born 24/10/1766 Jean-Baptiste: born 11/10/1768 Frederic: born 12/3/1773 (father of Elie Frederic)
My husband's great great great grandfather, Charles Foreyand the marechal's father were brothers.
I couldn't find in my record any of the Foreys that you have cited. But then on the other hand we don't have alot of information about the other Foreys except for the descendents of Charles.It is therefore totally possible that our families are connected in some way.. I would be greatful if you could share some of the research that you have done sofar.