Sarah Slater's Second Husband

[Susan Higginbotham]

Nettie's middle initial looks like a G ?
Isn't Sarah's middle name Antoinette.
And why use Nettie for her first name (short for Antoinette ?), if her given name is Sarah?

I believe the "G" is for Gilbert, her maiden name. She seems to have preferred "Nettie" as a younger woman and "Sarah" as an older one. In the days before Social Security cards I think people in general were looser about the use of their given names on official documents.