Gravina of Billerica, March 3, 2016, Francis E. "Frank" Gravina, III. Beloved son of Anne M. (Casello) Comeau of N. Fort Myers, Florida and her husband, Lou. Loving brother of Joseph Comeau and his girlfriend, Ruthanne Brown of Lowell, Tony Comeau of Lowell and the late Terri Smith. Also survived by nieces, nephews and cousins. Frank served in the U.S. Navy. He was an avid sports fan, who enjoyed watching the Patriots, Bruins and Red Sox. He also enjoyed playing pool.