William Alexander, b. 1805, Ireland, d. 1886, Delaware, OH.
He married m. Jane Carolina Tench (b. 1801, England), 1839, Philadelphia, PA.
Among others, they had a son:
John J. Alexander, b. 1841, Delaware County, OH, d. 1882, Joplin, MO; m. Violetta Smith Alexander Wren, 1867.
DNA results have just been released for a direct-male descendant of these two men, and matches no other Alexander previously tested.
More than 250 Alexander men have tested their yDNA and had their Alexander lines posted at:http://www.familytreedna.com/public/alexander-y-dna/default....
Their lines are grouped with those they match. About 75% of testers already have at least one Alexander match.
Alexander Surname DNA Project