DAVID F. BUTTERFIELD – of Woburn, passed away Sunday, May 1, 2016. He was eighty one years of age. Beloved husband of Loretta E. (Dimitri) Butterfield. Devoted father of Susan B. Valaitis and her husband George of New Hampshire and David F. Butterfield Jr. and his wife Patricia of Massachusetts. Dear brother of Nancy Delmonico of Woburn. Cherished grandfather of Aiden, Lucy, George and Joshua. A Service will be held in the Lynch-Cantillon Funeral Home, 263 Main Street, Woburn, on Friday, May 6th at 10:00 a.m.. Relatives and friends are respectfully invited to calling hours Thursday, May 5th from 3 to 7 P.M. Interment is private. Remembrances in David’s memory may be made to The American Diabetes Association P.O. Box 11454 Alexandria, VA 22312 .