Thomas Isaac Coffin Amory (1828-1864) was the son of Jonathan and Letitia Austin Amory and was born and raised in Jamaica Plain, Massachusetts. He was appointed a cadet at West Point by former president of the United States John Quincy Adams, and was graduated in 1851 from the United States Military Academy. In 1853 he was married to Mary B. Nolan. Amory was made a Captain in the 7th United States Regular Infantry at the start of the Civil War. He was subsequently promoted to Major of the 8th United States Regular Infantry before being commissioned in the Volunteer service as Colonel and commander of the 17th Massachusetts Volunteer Infantry. He was then appointed as Commissary of Musters for the XVIII Corps serving in the Department of North Carolina. He was serving on active duty in Beaufort, North Carolina when he died in October 1864.
Amory was brevetted Brigadier General, US Volunteers on October 1, 1864 for "gallant and meritorious services during the war."