John "Jack" Gaynor of River Forest, suddenly, age 78. Beloved husband of Mary Ann, nee Janecek; loving father of Michael Gaynor and Anne Gaynor; proud grandfather of Maeve and Quinn Gaynor; dear brother of Ellen Gaynor, O.P.; preceded in death by his siblings, Mary (late Sean) Coyle and Irene (late John) Donahue; fond uncle of many. Visitation Saturday January 6, 2024 from 9:30 a.m. until beginning of 10:30 a.m. Memorial Mass at Old St. Patrick Church, 700 W Adams St., Chicago, IL 60661 ( Free parking for Old St. Patrick Church is available in the parking garage at 625 W. Adams . An elevator is accessible on the north side of the church.). Interment private. In lieu of flowers, memorials are appreciated to Leo High School, 7901 S. Sangamon St., Chicago, IL  60620. Arrangements entrusted to Peter B. Kennedy & Co, Funeral Directors. For funeral info: 708-F-U-N-E-R-A-L.