| Obispo | González | 1916 | Labrador | | | BDST 14 |
| Ocerinjauregui | Iturriaga | 1916 | zapataria/zapatero | | | BDST 38 |
| Ojeda | Díaz | 1919 | * | | | BB.TT. 100 |
| Olaverría | Izaguirre | 1915 | Vaquero | | | BDST 13 |
| Olazaguirre | - | - | - | | | BDST 38 |
| Olba | Iranzo | 1915 | Escribiente | | | BDST 12 |
| Oles | Fernández | 1915 | campesino | | | BDST 14 |
| Olid | López | 1916 | landa-langilea campo | | | BDST 6 |
| Oliva | Guixá | 1917 | * | | | BB.TT. 3 |
| Oliva | Luna | 1915 | Labrador | | | BDST 14 |
| Olivares | Santua | 1916 | nekazaria/labrador | | | BDST 38 |
| Olivares | Blasco | 1915 | Textil | | | BDST 12 |
| Olivares | Sainz | 1915 | Jornalero | | | BDST 13 |
| Olivares | Gallego | 1915 | Oficinista | | | BDST 13 |
| Olivares | Herrero | 1915 | Broncista | | | BDST 14 |
| Olivares | Rodríguez | 1919 | Ebanista | | | BDST 14 |
| Oliveros | Andreu | 1916 | jornalaria /jornalero | | | BDST 38 |
| Oller | Oller | 1918 | - | | | BB.TT. 127 |
| Olmeda | Navarro | 1918 | * | | | BB.TT. 100 |
| Olmedo | González | 1915 | Campesino | | | BDST 14 |
| Olmo | Pérez | 1915 | Campesino | | | BDST 13 |
| Oltre | Llodra | 1915 | Mecánico | | | BDST 12 |
| Omañas | Cubillos | 1919 | * | | | BB.TT. 100 |
| Oralla | Morales | 1916 | landa-langilea campo | | | BDST 6 |
| Orbe | Mendiola | 1916 | zerbitzaria/camarero | | | BDST 38 |
| Orbegoso | Marchantes | 1920 | Ferroviario | | | BDST 14 |
| Ordóñez | Villa | 1918 | * | | | BB.TT. 3 |
| Orduela | Martínez | 1916 | landa-langilea campo | | | BDST 6 |
| Oregui | Marquina | 1916 | mekaniko laguntzailea/ayudante mecánico | | | BDST 38 |
| Orejudo | Silo | 1916 | landa-langilea campo | | | BDST 6 |
| Oria | Vera | - | - | | | BDST 6 |
| Ormaecheverria | Echeverria | 1917 | Mecánico | | | BDST 14 |
| Orobal | Ferrer | 1915 | Labrador | | | BDST 12 |
| Orozco | Azueta | 1916 | txoferra/chofer | | | BDST 38 |
| Ortega | Espada | 1916 | landa-langilea campo | | | BDST 6 |
| Ortega | Martínez | 1916 | landa-langilea campo | | | BDST 6 |
| Ortega | Valenzuela | 1916 | orgaria/carrero | | | BDST 6 |
| Ortega | Medina | 1920 | - | | | BB.TT. 127 |
| Ortega | Redondo | - | - | | | Hospital Militar Disciplinario |
| Ortega | Jiménez | 1916 | * | | | BB.TT. 3 |
| Ortega | López | 1919 | * | | | BB.TT. 3 |
| Ortega | Candelas | 1919 | * | | | BB.TT. 3 |
| Ortega | Valero | 1918 | * | | | BB.TT. 100 |
| Ortega | Hernández | 1915 | Jornalero | | | BDST 13 |
| Ortega | De la Torre | 1915 | Albañil | | | BDST 14 |
| Ortega | Baeza | 1917 | _ -- | | | BDST 14 |
| Ortega | Blanco | 1917 | Tejedor | | | BDST 14 |
| Ortega | Soriano | 1919 | Pintor | | | BDST 14 |
| Ortiz | - | - | - | | | BDST 38 |
| Ortiz | Frente | 1916 | landa-langilea campo | | | BDST 6 |