Groppi, Mary A. (Lazaro) of Lexington, formerly of Waltham, Dec. 29, 2012. Wife of the late Fred Groppi. Mother of Paul J. Groppi and his wife Beverly of Lexington and Janet Vaccarello and her husband Carmen of White River Junction, VT. Sister of Joseph Lazaro of Waltham, and Bernard Lazaro of Waltham. Grandmother of Kerri, Keith, Michael, Joseph, and John. Mary is also survived by 8 great grandchildren and by many nieces and nephews. Calling hours will be held Sunday January 6 at the Douglass Funeral Home, 51 Worthen Rd. Lexington from 2pm to 6pm. Relatives and friends are kindly invited. Donations in her memory may be made to Make A Wish Foundation, One Bulfinch Place, Boston, MA 02114. Private interment Mt. Feake Cemetery, Waltham.