William J. Mainzer, of Morton Grove, beloved husband of Mary Lou nee Terrill; dear father of Susan L. Mainzer of Austin, TX, Madeline R. Mainzer of Niles, IL and Patricia M. Milo of Stone Mountain, GA; loving grandfather of Mackenzie Bowen and Zachary G. Milo; cherished great grandfather of Bobby and Ryan; fond brother of Arthur Mainzer. A memorial visitation will be held at the Mainzer home 9507 Ozark Ave. Morton Grove, IL Sunday March 6th from 2 to 6 p.m. with a service at 3 p.m. Proud Army veteran of WW2.  He was an avid bicyclist and loved to play his harmonica. In lieu of flowers, donations to Shriners Hospital 2211 N. Oak Park Ave. Chicago, IL 60707 appreciated