US NAVY
John Peter Grethen Jr
October 12, 1925—August 31, 2004
LTJG
Life Timeline
78 years1925
Born
October 12, 1925
US NAVY
Service Record
World War II
World War II
Conflict
LTJG
2004
Passed Away
August 31, 2004
Service Record
Verified fields from cemetery source data.
Branch
US NAVY
Rank
LTJG
War / Conflict
World War II
Sourced from official cemetery data; last updated May 30, 2026.Learn more