Mary Hamilton Coolidge
By the 1896-1897 winter season, it was the home of architect Joseph Randolph Coolidge, Jr., and his wife, Mary Hamilton (Hill) Coolidge. Joseph Coolidge was the grandson of John Lowell Gardner, the son of Joseph and Julia (Gardner) Coolidge who lived at 147 Beacon (303 Berkeley).
Joseph and Mary Coolidge continued to live at 87 Marlborough in 1904, when they moved to the Longwood district of Brookline.
https://backbayhouses.org/87-marlborough/
Mary Hamilton Coolidge (Hill)
Birthdate: October 16, 1862 (89)
Birthplace: Boston, Suffolk County, Massachusetts, United States
Death: October 9, 1952 (89)
Boston, Suffolk County, Massachusetts, United States
Place of Burial: Cambridge, Middlesex, Massachusetts, United States
Immediate Family:
Daughter of Hamilton Alonzo Hill and Mary Eliza Hill
Wife of Joseph Randolph Coolidge, Jr.
Mother of Joseph Randolph Coolidge, VII; Julia Gardner Richards; Mary Eliza Coolidge; Capt. Hamilton Coolidge, USA; John Gardner Coolidge and 3 others
https://www.geni.com/people/Mary-Coolidge/6000000012620616590