I found the above connection on FamilySearch. However The first time I searched GENi, I found a discussion of Fabien Gallant that did not include Isaac among his children. I don't know whether that's just an oversight, or Familysearch has it incorrect. Since both are user-created, I am thrown into doubt about the accuracy of both sites!
And now I can't even achieve the same search results as last time, to review again.
Can anyone help? Thanks!