Frances T. (O’Byrne) Duff, 93, of Mattapoisett died Dec. 19 at Sippican Healthcare Center.

She was the widow of the late John R. Duff.

Born in Brockton, the daughter of the late Christopher and Sarah (O’Grady) O’Byrne, she lived in Mattapoisett most of her life.

She was a communicant of St. Anthony’s Church in Mattapoisett.

Mrs. Duff was formerly employed as a teacher and principal at Parting Ways School in Acushnet for many years before retiring from teaching at Ford Middle School.

She enjoyed boating.

Survivors include a son, John R. “Jack” Duff, Jr. and his wife Evelyn of Mattapoisett; a daughter, Maureen C. Best and her husband Robert of Mattapoisett; a brother, Christopher J. O’Byrne, Jr. of Abington; a sister, Lucille Peters of Raynham; nine grandchildren, Kimberly M. Riley, Keri L. Duff, Shelley R. Butler, John R. Duff III, Tara L. Ignacio, Robert W. Best Jr., Meghan E. Rocha, Maureen C. Best, and Ryan P. Best; 11 great-grandchildren, Braydon, Aja-Leigh, Harrison, Mackenzie, Jack, Drew, Marissa, Riley, Garrett, Amanda and Gavin; and numerous nieces and nephews.

She was the sister of the late Eleanor Dupuy and Sarah J. McGarry.

Her funeral was held on Dec. 22 from the Saunders-Dwyer Mattapoisett Home for Funerals, Mattapoisett, followed by her funeral Mass at St. Anthony’s Church. Her burial followed in Pine Island Cemetery.