Thomas J. Treacy of Acton, formerly of Arlington, died suddenly on October 9, 2018.  Beloved son of the late Michael and Celia (Walsh) Treacy.  Loving brother of Janet M. Fairweather of Burlington and the late Anne M. Crane of N. Easton.  Devoted uncle of many nephews and nieces and great nephews and nieces.  Tommy graduated from Cathedral High School in Boston.  Tom was an avid tennis player and sailor.  He was a voracious reader.   Visiting hours will be held at the Edward V. Sullivan Funeral Home, 43 Winn St., BURLINGTON (exit 34 off Rt. 128, Woburn side) on Monday, Oct. 22 from 6-8 p.m. Funeral from the funeral home on Tuesday, Oct. 23 at 9 a.m. Followed by a Mass of Christian Burial in St. Margaret's Church, 111 Winn St., at 10 a.m. Interment in Pine Haven Cemetery, Burlington. Donations in Tom's name may be made to the Boston's Children's Hospital Trust, 401 Park Drive, Suite 602, Boston, MA 02215, www.childrenshospital.org .