Brian P. O'Callaghan – After a courageous three year battle with colon cancer; beloved husband of Debbie (nee Hynes); awesome father of Eileen and Abigail;  devoted son of Audrey (nee Sherman) and Timothy O'Callaghan;  dear brother of William and Caitlin (Anthony) Olivier;  fond son in law of Mary Anne (nee Noone) and Sean Hynes;  loving  uncle, cousin, nephew and friend of many.  Visitation Monday 3-9 p.m. at Cooney Funeral Home 3918 W. Irving Park Road.  Funeral Tuesday 9:30 a.m. to Our Lady of Mercy Church for 10:00 a.m. mass.  Interment private.  In lieu of flowers donations to The Lynch Syndrome International-PO Box 19, Madison CT 06443 www.lynchcancers.com.  Info 773-588-5850 www.cooneyfuneralhome.com