Mahoney of NH., formerly of Cambridge, July 30, 2013, William “Billy” Mahoney, age 51. Beloved son of the late Edward and Madalyn (Hyson) Mahoney. Brother of Mary Smith of Plymouth, Edward Mahoney of Gloucester, James Mahoney of Everett, John Mahoney of Malden and Kathleen Kennedy of Everett. Also survived by nieces and nephews. Funeral from the John C. Burns & Sons Funeral Home, 305 Broadway, Cambridge, Saturday, August 3, at 9:00 a.m. followed by a funeral mass in St. Mary’s Church, Cambridge at 10:00 a.m. Relatives and friends invited. Visiting hours, Friday 4-7 p.m. Interment will be private.