User: What was the name of the slave who was Thomas Jefferson’s favorite?
Assistant: Jefferson had a number of slaves, but his favorite was Sally Hemings. Sally Hemings was the wife of one of his slaves, and they had several children together. She was also the mother of at least six of his children. Sally Hemings was a free woman of color, and her children were born free. She was a half-sister to Martha Wayles, Jefferson's wife.