Isaac Gilkerson
Isaac was born before 1800.  He died after 1816.

 Susannah Shanklin
Susannah was born before 1804.  She died after 1816.

 Thomas Madison Gilkerson
Thomas Madison was born about 1816 in Greenbrier County, Virginia.  He died on June 6th, 1851 in Greenbrier County, Virginia/West Virginia.