William John Monahan, 89, passed away on Tuesday, December 12, 2016. Devoted father of Joan Feiss, Stephen Monahan, and William Monahan and his wife Elaine. Loving grandfather of Kristin, Bryan, Stephen Jr., Christopher, and Caroline. Cherished brother of Richard Monahan. Visitation Thursday 2~4 & 7~9 P.M. at the O.B. Davis Funeral Homes, 2326 Middle Country Road, Centereach. Mass Friday 9:45 A.M. Assumption BVM RC Church. Interment Pinelawn Memorial Park.