Watson was the maternal grandfather of actress Mariette Hartley, who suffered with psychological issues she attributed to her being raised with her grandfather's theories.
Nina Hartley | Hartley Wintney | Bob Hartley | Pierre-Jean Mariette | Lindsay Hartley | Hartley's | Shannon–Hartley theorem | Matthieu Hartley | Marsden Hartley | Hartley | Hal Hartley | Abe Hartley | William James Hartley | Trevor Hartley | Thomas Hartley | Ralph Hartley | Mark Hartley | Mariette Bosch | Marcellus Hartley Dodge, Sr. | Little Hartley, New South Wales | Little Hartley | Jesse Hartley | Hartley Peavey | Auguste Mariette | Wilder W. Hartley | Thomas Hartley Montgomery | Thomas Hartley Cromek | The Haunting of Molly Hartley | St Mary's Church, Hartley Wintney | Roland Hartley House |