US NAVY
John Frederick O'Brien
October 11, 1940—March 30, 2014
EN3
Life Timeline
73 years1940
Born
October 11, 1940
US NAVY
Service Record
EN3
2014
Passed Away
March 30, 2014
Service Record
Verified fields from cemetery source data.
Branch
US NAVY
Rank
EN3
Sourced from official cemetery data; last updated May 30, 2026.Learn more