Trethewey H. Nancy (Johnston) Of Dedham, died peacefully surrounded by her family Oct. 14. Beloved wife of the late Ronald K. Trethewey. Devoted mother of Carol J. Corio, Richard S. Trethewey and his wife Christine, and Robert K. Trethewey and his wife Mary-Ellen all of Dedham. Loving grandmother of Jennifer D’Agostino of Burlington, Ross, Evan, Lauren, Erin, and Caitlin Trethewey all of Dedham. Visiting hours at the George F. Doherty & Sons Wilson-Cannon Funeral Home, 456 High St. Dedham Thursday from 4-8. Funeral Service at the Allin Congregational Church 683 High St. Dedham Friday at 11 AM. Relatives and friends kindly invited. Interment in Brookdale Cemetery, Dedham. In Lieu of flowers donations may be made in Nancy’s Memory to the VNA Care Hospice, 5 Federal St. Danvers, MA 01923. Retired principal of Trethewey Brothers of Roslindale.