The death notice for his sister Sarah has the middle name as "Kingsburg." They may have had the same middle name.
In the 1870 Federal Census, Cyrus & "Ellen" are living at Buffalo, Erie Co., NY, with their three children.
Cyrus was a member of the Oswego County, NY, Historical Society, founded in 1896: Cyrus Kingsbury Remington, Buffalo, N.Y., membership Nov. 24, 1896, No.22, Historian Pennsylvania Society of War of 1812.
Cyrus died at age 69 y 1 m 1 d. Cause of death was a cerebral hemorrhage.