We still need more DNA testing! So far none of the seven Blizzards y-DNA tested match each other, eventhough three are R1b1a2. It takes two men of the same line to prove descent of a line. (Especially because of war-time where accidents happened, or a child from a first marriage is included, or adoption.)
Of those tested there were no two markers exactly alike as you will better understand when looking at the chart:
Tarika Blizzard of VA distant cousin Richard tested E1b1a7a-yDNA.
Voluntine's son James Thomas Blizzard line tested G2a3b1-yDNA.
John Blizzard born 1780 in NC son John Haskew Blizzard descendants ended in Tennessee, is I2b1-yDNA.
Richard Blizzard and Keziah Carter descendant of NC tested R1b1a2-yDNA.
Jesse and wife Bettie of Pend. WV (desc. of John b. 1720 and Ruth) is R1b1a2-yDNA.
Eliza Jane's son John descendant tested R1b1a2-yDNA.