The Sumner family, to which the late Mrs. George Barstow Stetson belonged, is an old and prominent family of New England, descended from one William Sumner, who was born at Bicester, England, in 1605, son of Roger Sumner, of Bicester, Oxfordshire, and his wife Joane (Franklin).
William Sumner, the only child of Roger and Joane, married Oct. 22, 1625, Mary West, and they came to America with their four children in 1636, locating at Dorchester, Mass. He was made a freeman of the Colony May 17, 1637, and held many offices of importance, being selectman for nearly a quarter of a century. He was deputy from Dorchester to the General Court for eight years. He died Dec. 9. 1688, surviving his wife, who died June 7, 1676. Both are buried at Dorchester.