| Name | First names | Arrt | Date of death | Place of death | Regimental unity | Record | Initial data |
|---|---|---|---|---|---|---|---|
| ONORATO | Pierre Joseph Rene | 17e | 11/01/1914 | BOIS-LE-PRETRE (54) - FRANCE | 167 RI | ||
| ONROZAT | Frederic Louis | 12e | 10/11/1914 | RICHEBOURG (62) - FRANCE | 1 BCP | ||
| OP-DE-BEECK | Paul Emile | 20e | 02/27/1916 | LES-ISLETTES (55) - FRANCE | 17 RA | ||
| OPAL MOCKECK | Moise | 4e | 08/16/1916 | MAUREPAS (80) - FRANCE | 418 RI | ||
| OPDEBEK | Alfred | 18e | 11/12/1914 | CROUY (02) - FRANCE | 204 RI | ||
| OPEICLE | Aloïse Albert | 19e | 07/07/1916 | ECLUSIER (80) - FRANCE | 36 RIC | Fiche | |
| OPEICLE | Andre | 19e | 07/18/1918 | SAINT-GENGOULPH (02) - FRANCE | 1 BCP | ||
| OPIGEZ | Georges | 18e | 08/01/1918 | PASSY-SUR-MARNE (02) - FRANCE | 9 BCP | ||
| OPOCENSKY | Vaclav | 15e | 04/17/1917 | AUBERIVE (51) - FRANCE | Fiche | ||
| OPPENHEIM | Robert | 19e | 01/28/1916 | BELFORT (90) - FRANCE | 20 RD | ||
| ORAGE | Julien | 20e | 12/17/1914 | MAMETZ (80) - FRANCE | 319 RI | Fiche | |
| ORAIN | Louis Joseph | 7e | 10/02/1914 | LA-BOISSELLE (80) - FRANCE | 64 RI | ||
| ORAIN | Raoul Auguste Marie | 16e 18e | 06/16/1915 | ROCLINCOURT (62) - FRANCE | 2 RI | Fiche | |
| ORBANT | Louis Albert | 18e | 02/27/1916 | SOUVILLE-FORT (55) - FRANCE | 102 RAL | Fiche | |
| ORBLIN | Maurice | 15e | 08/28/1918 | CUTS (60) - FRANCE | 366 RI | ||
| ORCELLE | Charles | 9e | 04/02/1915 | SOUPIR (02) - FRANCE | 254 RI | ||
| ORCEYRE | Louis Ernest | 19e | 09/17/1916 | VAUQUOIS (55) - FRANCE | 358 RI | Fiche | |
| ORCIBAL | Alphone | 4e | 05/12/1915 | BOIS-LE-PRETRE (54) - FRANCE | 169 RI | ||
| ORDIONI | Ours | 15e | 04/07/1918 | JUMEL (80) - FRANCE | 28 RD | ||
| ORDITZ | Alphonse Camille | 16e | 03/04/1915 | MESNIL-LES-HURLUS (51) - FRANCE | 51 RI | Fiche | |
| ORDON | Alfred | 5e | 10/21/1915 | MOURMELON-LE-GRAND (51) - FRANCE | 44 RA | ||
| ORDONEZ | Louis Joseph Emmanuel | 17e | 04/18/1917 | AUBERIVE (51) - FRANCE | Fiche | ||
| OREILLE | Henri | 20e | 09/19/1917 | ZUIDHUIS - BELGIQUE | 15 SIM | Fiche | |
| OREME | Albert Auguste | 2e | 08/08/1916 | VAUX (55) - FRANCE | 43 RI | ||
| ORENGO | Charles Marius | 11e | 12/25/1914 | APREMONT (55) - FRANCE | 56 RI | Fiche | CORR |
| OREVE | Albert | 7e | 09/10/1915 | MOUDROS - GRECE | 8 RA | Fiche | |
| ORFILA | Michel Gaston Gabriel | 8e | 10/01/1915 | SOMME-BIONNE (51) - FRANCE | 4 BCP | Fiche | |
| ORGER | Charles Pierre Patient | 16e | 06/24/1918 | GELAUCOURT (54) - FRANCE | 265 RI | Fiche | |
| ORGET | Georges | 19e | 04/28/1916 | RARECOURT-SALVANGE (55) - FRANCE | 31 RI | ||
| ORGET | Rene Louis | 19e | 06/09/1917 | SOISSONS (02) - FRANCE | 109 RI | ||
| ORGIER | Maurice Pierre | 14e | 05/23/1917 | CRAONNELLE (02) - FRANCE | 1 RG | Fiche | |
| ORHAND | Julien Marie | 10e | 03/07/1916 | VERDUN (55) - FRANCE | 153 RI | Fiche | |
| ORHEL | Eugene | 13e | VERSAILLES (78) - FRANCE | ||||
| ORIENT | Maurice | 14e | 12/12/1914 | SAINT-ELOI - BELGIQUE | 2 RZ | Fiche | |
| ORIGONI | Jean | 19e | 09/25/1915 | AGNY (62) - FRANCE | 135 RI | ||
| ORIN | Valentin Ls | 4e | 10/26/1918 | MONASTIR-/-BITOLA - MACEDOINE | 34 RIC | ||
| ORINSTEIN | Jacob | 18e | 09/17/1917 | ZEMLAC - ALBANIE | RMLE | Fiche | CORR |
| ORIOL | Louis H | 11e | 01/12/1919 | RASTATT - ALLEMAGNE | 289 RI | ||
| ORION | Henri | 5e | 09/25/1915 | AGNY (62) - FRANCE | 135 RI | ||
| ORION | Louis | 19e | 05/18/1916 | DUGNY (55) - FRANCE | 109 RAL | Fiche | |
| ORIONOT | Gaston | 16e | 08/22/1914 | ROSSIGNOL - BELGIQUE | 1 RIC | Fiche | |
| ORIOT | Lucien | 15e | 08/29/1916 | DARMSTADT - ALLEMAGNE | 167 RI | ||
| ORJAS | Louis | 20e | 12/04/1914 | LES-ISLETTES (55) - FRANCE | 89 RI | Fiche | |
| ORJUBIN | Victor Francois Marie | 20e | 09/03/1914 | LOUVERCY (51) - FRANCE | 116 RI | Fiche | |
| ORLAND | Henri | 4e | 04/19/1917 | BERMERICOURT (51) - FRANCE | Fiche | ||
| ORLANDINI | Grégoire Julien | 3e | 10/06/1917 | Paris (75) - FRANCE | 24 SIM | Fiche | CORR |
| ORLEAN | Mordka | 11e | 08/07/1915 | VIENNE-LE-CHATEAU (51) - FRANCE | 1 RIC | Fiche | |
| ORLEANS | Jean Paul | 14e | 08/22/1914 | ETHE - BELGIQUE | 140 RI | Fiche | |
| ORLEANS | Marcel Eugene | 20e | 09/06/1914 | VAUBECOURT (55) - FRANCE | 4 RI | ||
| ORLHAC | Marie | 18e | 09/23/1914 | CHEPPY (55) - FRANCE | 24 BCP |
Legend
In blue: information corrected by a citizen. The CORR link shows the initial data.
A whole row in blue indicates a Mémoire des Hommes reference.