Ancestry and Find-a-Grave have Sarah Jackson who was the daughter of Mathew Jackson and Anne Dunavant married to William Deaton, not George Granberry. If she was married twice, it's not listed.
https://www.findagrave.com/memorial/134054818/sarah-deaton
So I was wondering if perhaps this is another Sarah Jackson who belongs to different parents. I did some Googling and most sites don't have parents listed for this Sarah. Wiki has a different set of parents, but no sources:
https://www.wikitree.com/wiki/Jackson-20979
This site lists her as Sarah (Unknown) Jackson, which makes it appear that perhaps she had been married to a Jackson before she married George Granberry and that her maiden name is unknown:
GEORGE5 GRANBERRY (J ames4, Jl,,foses3 ), born , died in Jefferson
County, Ga., 1805; married first, -------; married second. , SARAH(---) JACKSON.
https://www.seekingmyroots.com/members/files/G002816.pdf
This is possible since she was George's second wife. She could also been previously married.
I personally don't think she's the same Sarah who was a daughter of the parents here on Geni. This Sarah who is connected as her sister is the only one I've found to be their daughter: