Based on DNA and historical evidence, Thomas Jefferson is widely believed to have fathered the six mixed-race children of his slave Sally Hemings; four survived to adulthood. Hemings was three-quarters white by ancestry and a half-sister of Martha Wayles Jefferson. Their children were born into slavery because of her status; as they were seven-eighths European in ancestry, they were legally white under Virginia law of the time.
Hemings
Martha Wayles Jefferson.