Secretly married Mae West in 1914. West filed for divorce from Guido Deiro on the grounds of adultery on July 14, 1920. The divorce was granted by the Supreme Court of the State of New York on November 9, 1920.
In the early, 1700s the Deiro family was granted nobility and the title of Count, which Deiro held, and passed to his son upon his death.
Married Yvonne Le Baron de Forrest when she was age 16 and he was age 50.