There was a WILLIAM GADBERRY in Lincoln County, NC during the 1820 census. His wife is unknown. I have succeeded in documenting what I think is his family. In any case, I have the following set of siblings all pretty well documented:
1 William (Unproven) Gadberry b: Bet. 1755 - 1775 in Probably Virginia or Ireland d: Abt. 1830 in VA
.. 2 William P. Gadberry b: 1794 in VA d: 27 Nov 1833 in Yazoo County, MS
...... +Juliet G. H.. Young b: 1802 in Greenville Dist, S. C. d: 02 Apr 1895 in Yazoo County, MS
.. 2 Charles P. Gadberry b: Abt. 1796 in Possible Lincoln County, NC d: Aft. 1844 in Tallahatchie County, MS
...... +Elizabeth (?) Unknown b: in An Elizabeth CARBERRY is on the 1860 census of Tallahatchie County, MS. d: in See Notes
.. 2 Unknown Female Gadberry b: 1800 in NC or perhaps KY d: Bef. 27 Nov 1833 in Benton, Yazoo County, MS. This is Harold Fisher's 4th generation g grandmother.
...... +John D. Smith b: Aft. 1790 in Rowan County, N. C. d: Bef. 1870 in Yazoo County, MS
.. 2  Nancy Gadberry (proven) b: Abt. 1795 d: in Sibling (?) of WM P. GADBERRY and others
...... +Unknown Flowers
.. *2nd Husband of  Nancy Gadberry:
...... +West (?) Belk
.. 2 Allan Gadberry b: Aft. 1800 d: in S. C.?
.. 2 Lucy Ann Gadberry b: Aft. 1813 d: Bef. Jan 1861
...... +Maybe John M. Kerr b: 20 Jul 1803 in NC d: 17 Oct 1869 in Steel Creek Township, Mechlenburg County, NC
.. 2 James (Col) M. Gadberry b: Bet. 1815 - 1817 in N. C. d: 30 Aug 1862 in The PLAINS OF MANASSAS, Manassas, VA
.. 2 Cecilia (maybe) Gadberry d: Abt. 1823 in Mecklinburg County, NC maybe
The only noted one of these siblings was COL. JAMES M. GADBERRY of Union County, SC. He was a delegate and a signer of the SC ORDINANCE OF SECESSION, 20 December 1860.
Thanks for any scrap of information or firstname.lastname@example.org