His father, Mintus Northup, was a freed slave, who took his surname from the family he had served. Mintus's master, Captain Henry Northup, granted Mintus his freedom in his will. After the death of Captain Northup, Mintus, as well as becoming a free man, also managed, later on, to gain the vote by virtue of meeting New York State's property requirements, an impressive feat for someone coming from such a humble background. Mintus died in 1829.
Solomon's mother - unnamed in the book - was a woman of