Index to Probate Court Records in the Union County Courthouse, 1787-1864. 
Union County South Carolina Will Abstracts, 1787-1849, By Brent Howard Holcomb. 

Davidson--------Laura et. al.---- 20--------30--------1832
Davidson--------Samuel------------ 40--------37--------1855

"Union County Heritage"
published in 1981

p13/14 Macedonia Baptist Church, ordained J. D. Bailey.
Serving on the presbytery were....  A. D. Davidson..... 
(the year being 1885, probably not relative. mb)

p66/148  "Gaston of Chester" by Dr. Chalmers Gaston Davidson, 
of Davidson College family history on Davis and Gaston families.

p68/150  Norman Duke m. Martha Davidson of Clinton, SC who died in 1970.
(again... date not relative. mb)

p196/436  ...children of Thomas and Jean Rutherford Mayes b 1734...
were Jean, John, Edward, Margaret, Elizabeth and Thomas.....  
Elizabeth married William Davidson and moved to
Illinois.  They were members of the Fairforest  Presbyterian Church.

p355/738  Fairforest Presbyterian Church...
Elders of the church from late 1700's to early 1800's were... John Davidson

p376/778  The Corinth Baptist Church ..
Pastors of the Corinth Baptist Church are A.D. Davidson, 1882-1887,
A.D. Davidson 1890-1896, 1910-1911.

p377/780  Draytonville Baptist Church... the church was constituted on
October 15 1887, with the following persons serving on the presbytery: ...
the Rev. A.D. Davidson...

p381/784  Mount Ararat Baptist Church
A.D. Davidson, Pastor  1901-1906.

p382/785  Pacolet (Scull Shoals) Baptist Church
A.D. Davidson, Pastor 1894-1897.

382/786 Salem Presbyterian Church, perfected May 30 1840
...a partial list of the eldeers who have serve the church follows:
Robt. G. Davidson, John G. Davidson, Robt Lusk..... etc.