Anita, your Samuel "Rock" Tate who married Elizabeth Caldwell is a different line than my Samuel Tate who married (1) Dorcas [last name unknown] and (2) the widow Amey Burke. There are similarites, though. Both were born in Northern Ireland/Ulster within a year of each other, and both had sons named Robert, John, and Samuel in that order. Both died within a year of each other; yours in Burke Co NC and mine in Claiborne County TN. Y-DNA results have established my line as belonging to haplogroup R1b1a2a1a1b4, however I don't think the Y-DNA haplogroup of yours has yet been established, or if it has it is not matched to mine based on results in the Tate DNA Project.