Mercedes F. Mahoney, 86, of Hatboro, formerly of Willow Grove, on September 30, 2007.  She is survived by her son William Mahoney (Patt), her granddaughters Allison, Kelsey, and Annie, and her brother Roy Flynn (Sandy).  She was preceded in death by her husband John, her daughters Kathleen, and Susan, and her brother Lawrence.  Relatives and friends are invited to her visitation on Saturday October 6, 2007 from 830am to 10am at the John J. Bryers Funeral Home, 406 N Easton Rd., Willow Grove PA.  Funeral Mass to follow at 1030am at St. David RC Church.  Interment Holy Sepulchre Cemetery.  In lieu of flowers donations can be made to Cystic Fibrosis Foundation, 6931 Arlington Rd, Bethesda, Md 20814 or St. David RC Church, 316 N Easton Rd., Willow Grove PA.  www.bryersfh.com