My William's father Nathan was born in 1895. I can't trace further back than that. If your Agnes is sister to a William, maybe Nathan's father was a William? There is a hand written note next to Agnes and Hodgen's marriage date that says "Wm's daughter"....I just don't know which William.
The date I have on this marriage record is:
Agnes Childrey md Wm. Hodgen 11 Dec. 1787 in Richmond County, GA.
Do you have anything on Agnes' parents? Sorry I can't be more help.
Sherrie