Hi, I found 2 references to FF in "North Carolina and Tennessee, Early Land Records, 1753-1931" while working on the World Archives Project. These references are available to you now, and at least one additional land ownership reference to FF will be available to you when the WAP completes work on it.
If nothing else, this is an example of alternate spellings you might what to research.
Name: Felty Farmer Name: Felly Farner
Record Date: 29 Nov 1828 Record Date: 29 Nov 1828
Location: Tennessee Location: Henry, Tennessee
Warrant Number: 25924 Warrant Number: 25877