Hi, interesting document. I'm not sure if it's truly a pathway back to Gamache. This Nick Rouault married Frances Mangot( sister of the General Advocate of parliment) This Rene became a Jesuit priest. Iggy married Charlotte-of the many names, only daughter of of the Count of Romorentin. Joachim died in Paris, age 10 or 12.
Gabe died on a trip to Malta. Henry died in Beauchamp.Claude(tte ?)entered an arrainged marriage with Pierre???.
Marie and Charlotte became Urseline nuns(convent)
This man held the title of the Marquis of Gamaches and of Beauchamp. I know that they are two towns in France, my brother has been to Gamaches to visit a client of his. Of course, when some left France to come to the new world, they left the titles behind and sometimes simply used the name of the town or village they came from. That's what happened in my maternal grandmother's family.!
I will see if this coat of arms matches the one my brother has.