Duffy – Mary T. (Donovan), of Mattapan, October 1, 2015. Beloved wife of the late James T. Duffy. Father of James D. Duffy of Roslindale, Joanne M. Duffy of South Boston, Brian J. Duffy of Mattapan, Paul P. Duffy of Dorchester and the late Peter Duffy and Joseph Duffy. Grandmother of Ava, Delaney and James Donovan Duffy. Mother-in-Law of Jennifer Duffy.  A Mass of Christian Burial will be celebrated in Saint Gregory Church, Dorchester, Tuesday October 6th at 10:00 AM. Relatives and friends invited. Visiting hours at Dolan Funeral Home, 1140 Washington Street, DORCHESTER LOWER MILLS, Monday 4-7 PM. Interment Cedar Grove Cemetery.