| Oneal | Steven C. | | | | | Viet Nam | Continental United States - Viet Nam | Fort Wayne, Indiana | Fatality | Allen County Viet Nam Veterans Bonus Listing, Date of Entry 2-22-2011 |
| Oneal | Steven Clifford | | Spec 4th Class | Army | | Viet Nam - Cold War | Continental United States - South Viet Nam | Fort Wayne, Indiana | Killed Non-Hostile Jun 30 1971 | indianavietnammemorial,Homstead.com 9-29-2010 |
| O'Neal | Cody S. | | | | | | Continental United States | Fort Wayne, Indiana | | American Legion Post 47 News Letter June 2011 Page 2, New Member |
| O'Neal | E. D. | | | | | WWI | | Allen Co. | Deceased | General Electric Employees Monument, Aug. 15, 2014, McCullough Park, Broadway, Fort Wayne, IN |
| O'Neal | Ernest D. | | CPL | Army - Air Service Aeronautics | 32nd Company R. S. A. M. AEF | WWI | Continental United States - France | Allen County, Indiana | | History of War Work of Allen County, Indiana 1917 - 1919 Page 427 |
| O'Neal | Michael William | | SGT | Army - 1969 | | Vietnam - Cold War | Vietnam | Fort Wayne, Indiana | Deceased 6-7-1969, Born 5-18-1946 | https://www.archives.gov/files/research/military/vietnam-war/casualty/lists |
| O'Neal | Steven Clifford | | Specialist 4th Class | Army | | Vietnam - Cold War | Vietnam | Fort Wayne, Indiana | Killed in Action | News Sentinel Article, 4-30-2015, Front Section, Page 6A, Fort Wayne Vietnam War Deaths |
| O'Neil | Emmett J. | | CPL | National Army | 3rd Company 1st Battalion 159th Depot Brigade | WWI | Continental United States | Allen County, Indiana | | History of War Work of Allen County, Indiana 1917 - 1919 Page 427 |
| O'Neil | Raymond C. | | Seaman | Navy | | WWII | Continental United States - Pacific | Columbia City, Indiana - Meigs County, Ohio | | Journal Gazette obit., 8-16-2001 Metro Section Page 3C, Buried Christianl Chapel Church Cemetery, Merriam, Indiana |
| O'Neill | Patrick J. | | PVT | Army | | Vietnam Cold War | | Fort Wayne - Anderson, Indiana | | Journal Gazette obit., 12-30-2009 Metro Page 2C |
| O'Neill | Paul L. | | PVT | Army - Field Artillery Section | Battery B 150th Regiment USFA Rainbow Division AEF | WWI | Continental United States - France | Allen County, Indiana | | History of War Work of Allen County, Indiana 1917 - 1919 Page 427 |
| O'Neill | Paul L. | | Supply SGT | Army | Battery B 150th Regiment USFA Rainbow Division | WWI | Continental United States - France | Fort Wayne, Indiana | | History of War Work of Allen County, Indiana 1917 - 1919 Page 329 |
| Onion | Billy Rae | | Seaman | Navy | | Korean & Cold War | | Fort Wayne, Indiana | | List of Korean War Veterans 6-25-1950 to 7-23-1953, Date as of 8-1-1956 Page 141, Serial Number 9652841 |
| Onion | Bobby Thomas | | PVT | Army | | Korean & Cold War | | Fort Wayne, Indiana | | List of Korean War Veterans 6-25-1950 to 7-23-1953, Date as of 8-1-1956 Page 141, Serial Number US55111689 |
| Onorato | Anthiony D. | | PVT | Army | | Cold War | | Fort Wayne - Lafayette, Indiana | | News Sentinel obit., 12-11-2008 LOCAL SECTION Page 2L, Lafayette Chamber of Commerce |
