I have no information on your Alexander, but the George Allbaugh you reference in your post appears to be George E. Allbaugh, b. 6/13/1789, Frederick Co., Maryland; d. 5/14/1851 in Carroll Co., Ohio.I also show that he was married to Nancy Ann Springer.
They were married 8/26/1813 in Jefferson Co., Ohio.
I also show that they had 8 children, however, I did not know any of their names til I saw your post.
I also show that George had another wife by the name of Elizabeth Ammons, b. circa 1789.I don't have any marriage or child information on this marriage however.