In my quest at finding Adkins' family. I noticed how uncommon that name was. I remember seeing it and when I read your post I went to find it.
*This may -or- may not be the Greenbury you are needing. But, it might help.
On the 1860 census for Wise it states: pg. 2 family # 95
Adkins, Henry (33) M Farmer Real Worth: 500 Personal Worth: 347 Place of Birth: North Caroline (and all of the following) Patsy E. (37) F House Keeper Both being Illiterate John W. (9) M Nancy E. (8) F William (4) M Greenbury (1) M
I have not made it as far as to find a relation to me. But, I might one day. I hope this helps you though. And if so, please let me know.