I'm doubtful this Nancy's father and husband were both named Jeremiah Melton even though their surnames are different. Reason being I'm tracing the line from a cousin's tree on Ancestry and she has Nancy's father as
Jeremiah Lucian Burnett
B:1775 Brunswick, North Carolina, United States
D:11 Jun 1822 Clarke, Georgia, United States
but her husband as Jeremiah Melton Daniell
It's coincidence enough they're both named Jeremiah but she does show them having different middle names.