You didn't provide enough identifying info to know which Fred Denno you're referring to.
However I did find a Fred Denno in Rochester.
1920 Rochester, Monroe, NY
Mary Denno, b. NY, 52, widow
Fred D., b. NY, 29, teamster carting
Eva M., b. NY, 13
1940 Rochester; Monroe County Penetionary
Fred G. Denno, b. NY, 52, married, prisoner, education=8th grade
Born: 10 Feb 1890
Enlisted: July 22, 1918
Honorable Discharge: Nov 20, 1919
Private First Class
Died: 30 April 1954
Buried: Riverside Cemetery, Rochester, NY
Source: U. S. Headstone Applications for Military Veterans 1925-1963