Joyce: I have not determined the ancestry of Gabriel Alexander. However, data I have collected indicates he was a b/o Andrew and James Alexander, all of whom arrived in Augusta Co., VA, abt 1746 and purchased land in Beverley Manor. I am convinced Andrew, Gabriel, and James were closely related to Archibald and Robert (my line) Alexander, but have not yet proven the relationship. Here's what I have on Gabriel:
GABRIEL ALEXANDER (Parents Unknown; b/o Andrew & James): farmer, b. ca 1710, Ulster, Ireland; d. 1778/79, Augusta Co.; bur. Sinking Springs Cemetery, Augusta Co.; m. ca 1730, prob. in Ireland, to DORCAS N.N. Known Issue: James, Francis, Dorcus, Margaret, John, Elizabeth, Gabriel, and Mary.
This is an abstract of his Will, written 25 Aug 1778, Will Book No. 6, p. 54: To wife, Dorcus; to son, James, 5 shillings; to son, Francis, 5 shillings; to daughter, Dorcus Lackey, 5 shillings; to daughter, Margaret; to son, John, 60 acres on South River, part of home plantation joining John's other land and William Long; to son, Gabriel, tract owned by locator and James Bell. Executors, sons Gabriel and James. Teste: Samuel and David Long, John Bell. Proved, 16th March, 1779, by John Bell and Samuel Long. Executors qualify.
Sources: (1) Gabriel Alexander's Will, Augusta Co., Will Book 6, p. 54; (2) LDS IGI File #451107; (3) Chalkey's Chronicles of the Scotch-Irish Settlement in VA , Vol. 1 & Vol. 3, p. 278 & 279; (4) National Genealogical Society Quarterly, Vol. 25, p. 51.