This may also be the same man:

Officers of the Continental and U.S. Navy and Marine Corps, 1775-1900 Officers of the Continental and U.S. Navy and Marine Corps, 1775-1900

Name: Dean W Tainter
Rank Information: Acting Ensign, Resigned
Service Dates: 1 Oct 1862
Military Branch: US Navy Officers (1798-1900)

~~~~~ALSO~~~~~
1890 Veterans Schedules 1890 Veterans Schedules

Veteran's Name: Dean W Tainter
Home in 1890 (Township, County, State): Jackson, Maries, Missouri
Year enlisted: 1861
Year discharged: 1865
Rank: Ensign
COMPANY: View image
Regiment or vessel: View image
Length of service: View image

Source Citation: Year: 1890; Census Place: Jackson, Maries, Missouri; Roll: 29; Page: 2; Enumeration District: 127.

Source Information:
Ancestry.com. Officers of the Continental and U.S. Navy and Marine Corps, 1775-1900 [database on-line]. Provo, UT, USA: The Generations Network, Inc., 2007. Original data: Edward W. Callahan, ed. List of Officers of the Navy of the United States and the Marine Corps from 1775 to 1900. New York: L. R. Hamersly, 1901.

Patricia