I only find an Agathe Gamelin born on Oct. 10, 1745 to Laurent-Eustache Gamelin & Marie-Joseph Dudevoir. I don't have when she died. So, there should be another Agathe somewhere!
Again, I ask: Whose mother is this Agathe suppose to be? And who was this person married to?
Without this information it is difficult to help with just the name AGATHE! I do not have an Agathe as daughter to Charles-François Hamelin & Marie-Athanase Sauteuse although that does not mean there wasn't one.