 | O´Neill, James Joseph | | 05-05-1943 |  |
 | O'Arie, Nic | 10-07-1918 | 13-04-1945 |   |
| O'Barr, William Connie "Bill" | 29-04-1923 | 13-04-2006 |   |
 | O'Brian, Peter Geoffrey St. George | 17-12-1917 | 15-04-2007 |  |
| O'Brien, Frank Michael | 31-03-1875 | 00-09-1943 |  |
| O'Brien, Gordon | | 09-02-1945 | |
| O'Brien, Henry J. | | |  |
| O'Brien, J.J. | | 11-01-1944 | |
| O'Brien, James | 18-06-1923 | 15-06-1945 | |
 | O'Brien, Joseph Somerton | 09-04-1912 | 07-09-1940 |  |
| O'Brien, Patrick | | |  |
| O'Brien, Robert F. | | |  |
| O'Brien, Terence M. | | 03-03-1945 | |
 | O'Brien, Thomas Joseph | | 12-10-1944 | |
 | O'Brien, William | | 07-11-1944 | |
| O'Brien, William Attrata | | 18-09-1939 | |
 | O'Brien, William J. | 00-00-1899 | 07-07-1944 |  |
| O'Brien, William P. | | |  |
 | O'Bryan, Joseph R. | | | |
| O'Bryant, Virgil L. | | | |
| O'Byrne, Patrick | | 26-10-1941 | |
 | O'Callahan, Joseph Timothy "Father Joe" | 14-05-1904 | 18-03-1964 |      |
| O'Connell, Bernard Joseph | | 18-12-1945 | |
| O'Connell, Cornelius Frederick | | 26-05-1943 | |
 | O'Connell, George Francis Leo | 08-12-1923 | 22-06-1944 |  |
| O'Connell, Gerald Moore (Jr.) | 04-04-1922 | 04-08-1944 | |
| O'Connell, Melvin Donald | 06-06-1911 | 10-12-1941 | |
 | O'Connell, Phillip B. "Phil" | | 28-10-1942 | |
| O'Connell, Robert | | | |
| O'Connell, Robert William | | |  |
| O'Conner, Benjamin William | 05-06-1917 | |       meer |
| O'Conner, Edward | 00-00-1923 | |  |
| O'Conner, Gerard J. | | 04-07-2006 | |
| O'Connor, David | | | |
| O'Connor, Edward | 00-00-1923 | | |
| O'Connor, Edward Albert | | 21-07-1944 | |
 | O'Connor, Frances Lenora | 03-04-1917 | 21-12-1993 |   |
| O'Connor, James | 21-04-1887 | 24-05-1915 | |
 | O'Connor, James Joseph | 16-09-1928 | 17-03-1945 | |
| O'connor, Maurice | | | |
| O'Connor, Roger | 15-10-1919 | | |
| O'Connor, William Farrell | 19-10-1895 | 17-10-1918 | |
 | O'Daniel, John Wilson "Iron Mike" | 15-02-1894 | 27-03-1975 |   meer |
| O'Day, George | | | |
| O'Dea, Cifford J. "John" | | 12-04-1945 | |
| O'Dell, Loren E. | | | |
| O'Donnell, E. | | | |
| O'Donnell, John | | 26-11-1944 | |
| O'Donnell, Patrick | | |  |
 | O'Donnell, Patrick Joseph | | 25-11-1944 | |
 | O'Donoghue, Charles | 00-00-1914 | 01-04-1943 | |
| O'Donovan, John F. | | | |
| O'Driscoll, Finan | 18-07-1916 | 16-01-1942 |   |
| O'Farrell, Charles Plunkett John | | 05-08-1943 |  |
| O'Farrell, Hugh R. | 11-05-1914 | |  |
| O'Farrell, Rufus E. | 24-07-1917 | 10-04-1943 | |
| O'Flaherty, Hugh | 28-02-1898 | 30-10-1963 |  |
| O'Flaherty, Laurence James | | | |
| O'Flaherty, William J. | | | |
| O'Grady, Arthur Edward | | |  |
| O'Grady, David Thomas | 25-03-1924 | 17-12-1944 | |
| O'Grady, Martin J. | | 30-04-1945 | |
 | O'Hagan, Leo Francis | 26-04-1914 | 00-00-1968 |   |
| O'Hara Keating, John Gerald | | 08-09-1941 | |
| O'Hara, Clifford Charles | | | |
| O'Hara, Francis | | |  |
 | O'Hara, Gerald | | 15-03-1944 | |
| O'Hara, Leonard William | | 16-06-1942 | |
 | O'Hara, Otis Conwell | 06-11-1916 | 30-03-2005 |  |
 | O'Hare, Edward Henry "Butch" | 13-03-1914 | 26-11-1943 |  meer |
| O'Hare, Patrick John | | |  |
| O'Harmar, V.D. | | | |
 | O'Heare, Robert Ernest | | 31-03-1944 | |
 | O'Kane, Richard Hetherington "Dick" | 02-02-1911 | 16-02-1994 | meer |
| O'Keefe, Arthur J. | | | |
| O'Keefe, Patrick S. "Patty" | 03-04-1926 | 08-02-2003 |    |
| O'Laughlin, James F. | | 20-09-1944 | |
| O'Leary, Arthur Alexander | 04-01-1921 | 21-04-1987 |  |
| O'Leary, Donoval L. | | | |
| O'Leary, Frank | | 23-11-1944 | |
| O'Leary, Robert J. | | | |
 | O'Malley, Joseph | | 14-10-1944 | |
 | O'Meara, James Joseph | 20-02-1919 | 04-06-1974 | meer |
| O'Meara, Joseph D. | | 31-01-1944 | |
| O'Meara, Thomas F. | | 12-01-1945 | |
| O'Meara, William A. | | 02-01-1945 | |
| O'Neal, Levi | | | |
| O'Neil-Shaw, Denzil Philip Liddell | 00-00-1910 | 00-00-1968 | |
| O'Neil, George Connor Watson | 00-10-1915 | | meer |
| O'Neill, Alphonsus Benedict Joseph | | |  |
 | O'Neill, Bernard William | | 08-05-1945 | |
| O'neill, Clarence | | | meer |
 | O'Neill, Daniel | 27-02-1918 | 03-02-1943 | |
 | O'Neill, Eugene Hugh "Mick" | 00-09-1913 | | meer |
| O'Neill, Hugh Francis 'Peggy' | 00-00-1920 | |   meer |
| O'Neill, James | | |  |
| O'Neill, James Francis | | 28-04-1945 | |
| O'Neill, James Joseph | 16-07-1925 | 20-08-1944 | |
| O'Neill, John | | 15-10-1944 | |
| O'Neill, John J. | | | |
| O'Neill, John Joseph | | | |
| O'Neill, Marc Marie Patrick | 29-10-1909 | 18-07-1956 |      |
 | O'Neill, William Francis | | 22-05-1944 | |
| O'Neill, William J. | | | |
| O'Pray, Alfred | | 01-04-1945 | |
| O'Reilly, C.V. | | | |
 | O'Reilly, Felix | | 16-11-1944 | |
| O'Reilly, James Patrick Gallery | 12-12-1920 | 22-06-1943 | |
| O'Reilly, Michael Douglas | 00-00-1922 | | |
| O'Rourke, Patrick | | 10-02-1945 | |
| O'Scoggin, Eulus (Jr.) | 10-10-1920 | 06-07-1944 | |
| O'Shea, John William Robert | | | |
 | O'Sullivan, D. | | 23-04-1918 | |
| O'Sullivan, Denis | | 26-06-1943 | |
| O'Sullivan, Francis William | | 15-10-1942 | |
| O'Sullivan, Hugh Barry | | 00-07-1956 | |
| O'Sullivan, John | | 22-01-1944 | |
| O'Sullivan, John Dennis | | 02-06-1942 | |
| O'Sullivan, John Gregory | | 26-06-1942 | |
| O'Toole, Alphonsus Lawrence | | | |
| O’Bannon, Wilcie A. | 18-05-1922 | | |
| O’Beirne, Emmet | | | |
 | O’Brien, Henry Earl | 15-08-1922 | 12-09-1985 | |
| O’Brien, Martin J. | | | |
 | O’Brien, William H. "O’Be" | | 12-05-1944 | |
| O’Connor, Richard Nugent | 21-08-1899 | 17-06-1981 | meer |
| O’Dowd, Jerome J. | | | |
| O’Flaherty, Frank Woodrow | | | |
| O’Hearn, Mathew Charles, Jr. | | | |
| O’Keefe, Jeremiah Joseph | | | |
| O’Neil, Guy Edward, Jr. | | | |
| O’Reagan, William V. | | | |
 | O’Reilly, Martin G. | | 04-07-1945 | |
 | O’Rourke, Vincent Patrick | 19-05-1922 | 14-07-2011 | meer |
| O’Toole, John A. | | | |
| O’Toole, Joseph P. | | | |
| O'Daniel, John W., Jr. | | 20-09-1944 | |
| O'Sullivan, Patrick | | | |
| Oades, George Arthur | | 21-01-1945 | |
| Oakes, Arthur Stanley | 00-00-1920 | 25-01-1943 | |
| Oakes, Eric Raymond | | | |
| Oakeshott, Geoffrey Jonathan | 20-04-1922 | | |
| Oakley, Benjamin T. | | | |
| Oakley, Bernard James | | 16-10-1944 | |
| Oakley, John Williamson | | 25-05-1944 | |
 | Oakley, Thomas Benjamin Jr. | 27-02-1912 | 08-11-1944 | |
| Oakman, George P. | | | |
| Oaks, Orville | | | |
 | Oancia, Stefan | 05-03-1923 | 06-05-1999 |  |
| Oates, Arthur Henry | | | |
| Oates, Charles R. | | | |
| Oatridge, Kenneth | | 27-04-1943 | |
| Oatts, John Douglas | | 26-11-1941 |  |
 | Oba, Sakae "Fox of Saipan" | 21-03-1914 | 08-06-1992 |   |
| Oba, Snichi | 27-02-1922 | 21-08-1944 | |
| Obarski, Henryk | | |  |
| Obata II, T. | | | |
 | Obata, Hideyoshi | 02-04-1890 | 11-08-1944 |      |
| Obel, Johann | | |    |
| Obelink, A. | | | |
| Obenauer, Leonhard (Jäger-Pionier-Bataillon 5) | | |    |
 | Obeney, Edward Charles | | 10-05-1945 | |
 | Obenhaupt, Heinz | 04-10-1917 | | |
| Ober, Ernst | | | |
 | Ober, Johann | | 01-10-1943 |   |
 | Ober, Lorenz | 19-07-1915 | 28-02-1942 | |
 | Oberauer, Michael | 09-05-1916 | 26-10-1941 | |
| Oberauer, Rudolf | | | |
| Oberbacher, Josef | 01-07-1926 | 24-12-1944 | |
| Oberbeck, Herbert | 11-10-1909 | |   meer |
| Oberbeckmann, Werner | | | |
| Oberberger, Alois (Aufklärungsgruppe 23) | 02-03-1918 | |   meer |
| Oberbracht, Friedrich-Karl (s.Pz.Abt. 501) | 19-12-1920 | 13-01-1945 | |
| Oberdak, Czeslaw | 11-11-1921 | 08-03-1945 |  meer |
| Oberdieck, Helmut | 28-06-1918 | | |
| Oberdiek, Dr. , Heinrich | | |   |
| Oberembt, Alfred | | | |
| Oberg, Oliver E. | | | |
| Obergaulinger, Ludwig | 07-11-1911 | |  |
 | Obergethmann, Eduard | 30-04-1898 | 13-04-1943 |      meer |
| Obergfell, Eugen | 19-03-1912 | |  |
| Oberhage, Herbert | | | |
 | Oberhammer, Gottfried | 06-12-1907 | 00-00-1945 | |
 | Oberhauser, Herta | 15-05-1911 | 24-01-1978 | |
| Oberhäusser, Eugen | 20-03-1889 | 00-00-1957 |       meer |
| Oberheuser, Herta | 15-05-1911 | 24-01-1978 | |
| Oberhofer, Hans | 06-09-1900 | 20-02-1945 |  |
| Oberhoff, Kurt | | | |
| Oberjatzas, Wilhelm | | | |
 | Oberkandler, Alois | 22-08-1914 | 06-10-1941 | |
| Oberkircher, Karl | 10-12-1916 | 28-11-1976 | |
 | Oberländer, Werner | 16-12-1912 | 12-10-1996 |  |
| Oberländer, Wilhelm | | | |
| Oberlein, Herbert | 13-08-1900 | | |
| Oberleitner, Anton | | | |
 | Oberlinner, Josef | 29-04-1921 | 24-01-1944 | |
| Oberloskamp, Hans-Günther | | | |
| Oberloskamp, Walther | 27-01-1920 | 26-06-1944 | |
| Obermaier, Albrecht (3. Schnellbootsflottille) | 09-07-1912 | 01-08-2004 |  |
| Obermaier, Franz | | | |
 | Obermaier, Georg | 23-03-1906 | 30-01-1944 | |
| Obermaier, Johann ("U 435") | 10-08-1919 | 09-07-1943 |  |
| Obermair, Friedrich | | |  |
| Oberman, F.P. | | 23-10-1941 | |
| Oberman, Gerk | 14-12-1918 | 08-03-1945 | |
 | Obermayer, Jakob | 29-03-1912 | 29-03-1942 | |
| Obermayr, Hans | | | |
 | Obermayr, Martin | 06-11-1908 | 02-09-1942 | |
 | Obermayr, Otto | 03-10-1912 | 03-11-1942 | |
 | Obermeier, Alois | 11-02-1920 | 24-07-1943 | |
| Obermeier, Eugen | 15-12-1916 | 17-03-1943 | |
| Obermeier, Georg | 02-11-1917 | | |
| Obermeier, Georg | 03-03-1912 | 17-07-1942 | |
| Obermeier, Hermann | | 08-05-1942 | |
| Obermeier, Josef | 07-11-1912 | 16-03-1945 | meer |
| Obermeier, Ludwig | | | |
| Obermeier, Ludwig | 24-11-1914 | |  meer |
 | Obermeier, Sebastian | 05-01-1920 | 30-08-1943 | |
| Obermeijer, Vilmos | 02-12-1914 | 28-10-1944 | |
| Obermeit, Heinz | 15-01-1912 | 15-02-1980 | |
 | Obermoser, Peter | | 03-07-1944 | |
| Obermüller, Alois | | | |
| Obermüller, Erich | | | |
 | Obermüller, Franz | 13-09-1918 | 29-07-1943 | |
| Obermüller, Georg | | | |
| Obermüller, Gerhard (Grenadier-Regiment 415) | | |  |
 | Obermüller, Kaspar | 19-05-1913 | 23-02-1943 | |
| Obernberger, Franz (Nacht-Schlacht-Gruppe 1) | 13-01-1914 | 05-08-1944 |   |
 | Oberndorfer, Josef | 16-11-1919 | 09-08-1941 | |
 | Oberndorfer, Josef | | 28-01-1944 | |
 | Oberndorfer, Rudolf | 06-01-1909 | 02-02-1943 | |
 | Oberndorff, Dr.jur., Graf von, Fritz | 20-12-1891 | 27-03-1970 | |
| Oberndorff, Graf von, Franz | | | |
 | Obernhuber, Franz Xaver | 03-07-1912 | 12-01-1943 | |
| Obernhuber, Otto | | 23-05-1942 | |
| Obernitz, von, Hans-Günther | | | |
| Obernitz, von, Justin | 30-12-1884 | 24-09-1955 | |
| Obernolte, Clyde H. | | |  |
 | Oberpaul, Leonhard | 12-07-1922 | 31-10-1942 | |
 | Oberquelle, Erich | 14-12-1918 | | |
