I am a descendent of James Blair. The father and a brother of James Blair, Sr. were Colbert Blair and Colbert Blair, Jr.. James Blair (b 1761) married Mary Elizabeth Powell (b 1765), dau of Elias, son of John II (b abt 1715), son of ?John I (b 1644), son of William (b 1619, England). there may be a generatio missing between John I and II, or the birth dates may be wrong.
Regarding an earlier post in this thread, James Blair served in the Continental Army, as did 2 or 3 of his brothers. James is believed to be the famous "Rebel Rider" of the Battle of Kings Mountain, and he is famous for surveying the Blair Line in Georgia. He and his family settled in Habersham County, GA, and many of his descendents live there. His Revolutionary War Pension Claim number was S22125, date 16 Oct 1827, Franklin Co, GA. You can find much more at:http://mysite.verizon.net/vze1uj96/blair/