Watson was a member of the Watson Family, famous in the early days of Hollywood as being a houseful of child actors. He was brother to Coy Watson Jr., Harry, Billy, Delmar, Garry, Vivian, Gloria, and Louise, all of whom acted in motion pictures.
The family, known as "the first family of Hollywood", lived by the Echo Park area of Los Angeles and Bobs attended nearby Belmont High School.
They were honored by the Hollywood Chamber of Commerce by placing the Watson family star on the Hollywood Walk of Fame, at 6674 Hollywood Blvd., Hollywood, California.
