U.S. Army
John Jonas Keffer
November 27, 1888—September 30, 1964
TSGT
Life Timeline
75 years1888
Born
November 27, 1888
US ARMY
Service Record
World War I
World War I
Conflict
TSGT
1964
Passed Away
September 30, 1964
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
TSGT
War / Conflict
World War I
Sourced from official cemetery data; last updated May 30, 2026.Learn more