Yes, the Elam ALEXANDER that I am interested in is the one who m. Ann Stone in 1838. I believe, but am not positive, that they did not have children of their own and that the [Mrs. Davenport?] that he left a legacy to in his will was his step-daughter.
I do not know who the other Elam in Elbert County was - the one who m. Lucy Terry. Nor do I know who the Reuben was that you found in GA. If Elam ALEXANDER in Bibb County did have children, he did not leave anything at all to them in his will (1862).
You ask if I have more information on this family -- if you mean Elam's siblings, the answer is yes.
My direct line was Elam's older brother, Reuben ALEXANDER, who settled in Jackson County, Indiana. However, there were a number of brothers who all settled in or near Rutherford County, Tennessee. Elam was also there for awhile before moving to Georgia.
At least one brother and one married sister settled in Texas probably before 1840. So far as I can guess, they did spend some time in Missouri before reaching their final destination.
If you have any specific quesitons about this line, I am happy to share all that I have.