After his father died, Richard Johnson inherited Julia Chinn, an octoroon mixed-race woman (seven-eighths European and one-eighth African in ancestry), who was born into slavery around 1790. She had grown up in the Johnson household, where her mother served. Julia Chinn was the daughter of Benjamin Chinn, who was living in Malden, Upper Canada, or London, Canada, and a sister of Daniel Chinn. An 1845 letter from Newton Craig, Keeper of the Penitentiary in Frankfort, Kentucky, to Daniel Chinn, mentions another brother of Julia Chinn named Marcellus, who accompanied Col. Johnson on his first electioneering tour for Vice-Presidency. Marcellus left Col. Johnson in New York, whereupon Col. Johnson tried to find Marcellus' whereabouts from Arthur Tappan, Esq.