The yDNA haplogoroups of some of the former American presidents

John Adams - R1b

John Quincy Adams - R1b

Zachary Taylor - R1b

Franklin Pierce - R1b

James Buchanan - R1b

Abraham Lincoln - R1b

William McKinley - R1b

Woodrow Wilson - R1b

Lyndon Johnson - E1b1b1

Thomas Jefferson - T (formerly K)