Dennis M. O’Brien, 72, of Hanover Park. Beloved dad of Pamela (Frank) Nuenthel and the late Dennis Jr; loving grandpa of Franky; loving mate of Sandra Conrow and her family Kathleen (Anthony) Williams, Shane Conrow, Matt, Kevin and Toby. Dennis was an avid Cubs and Bears fan, he enjoyed fishing and being with all of his family and friends. Cremation at the Countryside Funeral Home and Crematory, 950 South Bartlett Rd (at Stearns Rd), Bartlett. Private burial at Queen of Heaven Cemetery.