Following information extracted from Georgia Archives Virtual Vault records of Headright & Bounty Plats for Burke County, Georgia, which includes Alexander Douglas and others named Douglas, dated 1786 to 1819:These records available on following website:
Douglas, Alexander,243 acres,in Burke County, 27 Jan 1786
Douglas, Alexander,100 acres,Burke County, 14 Mar 1788
Douglas,Edward, 100 acres, Burke County, 27 Jan 1786
Douglas,Edward,150 acres,Burke County, 27 May 1786
Douglas,Frederick,150 acres,Burke county, 6 Feb 1787
Douglas,James, 275 acres, Burke County, 8 Aug 1788
Douglas,Henry,200 acres, Burke County, 22 Jan 1788
Douglas,Samuel C.,8 acres,Burke Coutny,1 Jun 1819
Douglas, William,35 acres, Burke County, 13 May 1800
Douglas, Wright,200 acres, Burke County, 7 Jun 1788
Alexander Douglas was a witness on one of these records for my 4th great grandfather's son, Robert Black (plat dated 10 Jan 1805), for 1000 acres in Screven County, Georgia.
William Black, Rev. Sol., (1753-1826) m. Elizabeth Jane Tumberlin (b. 1755, d. Screven Co. GA)
Their children:Robert Black, b. May 1775, John J. Black, Sr., b. 1777, Ann Black, Jane Black, William W. Black, Jr.
My great, great, great grandfather was John J. Black, Sr., b. 1777.John Black named his 2nd son, Douglas Black (b. 1805).I believe these two families are related.
If anyone related to Alexander Douglass has information that might help, I would greatly appreciate it.