David W. Duncan, 67, of Marblehead and Southern California, died at his home on May 17, 2015. He was the husband of Janet M. Duncan; father of Julia and Brian Duncan; grandfather of Von; brother of Brent, Debbie, and Dwight Duncan. He was also loved by many family members, friends, and colleagues. Born in Whittier, CA, he was the son of the late Don and Lavon Duncan. The family welcomes all to a celebration of his life at the West Parish Church, located at 129 Reservation Road, Andover, MA on Thursday, May 21 at 4PM. In lieu of flowers, please consider a donation to the Scholarship America Foundation www.scholarshipamerica.org or the National Parkinson's Foundation www.prkorg.convio.net Arrangements by Eustis and Cornell of Marblehead.