| Ibáñez | Azpitarte | 1916 | praktikantea/practicante | | | BDST 38 |
| Ibáñez | Santiago | 1916 | denda-saltzailea/dependiente | | | BDST 38 |
| Ibáñez | Rosales | 1916 | landa-langilea campo | | | BDST 6 |
| Ibáñez | Javier | 1915 | Zapatero | | | BDST 12 |
| Ibarra | González | 1915 | * | | | BDST 12 |
| Ibarra | García | 1915 | Barbero | | | BDST 12 |
| Ibarra | Hortas | 1919 | Industrial | | | BDST 14 |
| Ibarreche | Garay | 1916 | tornularia/tornero | | | BDST 38 |
| Ibarrelucea | Sangroniz | - | - | | | BDST 38 |
| Idígoras | Loidi | 1918 | Herrero | | | BDST 14 |
| Iglesias | Posada | - | - | | | Hospital Militar Disciplinario |
| Iglesias | Izquierdo | 1916 | * | | | BB.TT. 3 |
| Iglesias | Pérez | 1917 | * | | | BB.TT. 100 |
| Iglesias | Alvarez | 1918 | * | | | BB.TT. 100 |
| Iglesias | Cantero | 1915 | campesino | | | BDST 14 |
| Iglesias | Martín | 1916 | albañil | | | BDST 14 |
| Igual | Terreros | 1916 | abere-hiltzailea/matarife | | | BDST 38 |
| Igual | Vázquez | 1915 | Labrador | | | BDST 13 |
| Illana | Moya | 1915 | - | | | BB.TT. 106 |
| Illari | Beraza | 1916 | enplegatua/empleado | | | BDST 38 |
| Inchausti | Bicarregui | 1916 | nekazaria/labrador | | | BDST 38 |
| Insunza | Zarate | 1916 | desbideratzailea/desviador | | | BDST 38 |
| Iranzo | Moreno | 1915 | Labrador | | | BDST 12 |
| Irastorza | Iduain | 1918 | Obrero | | | BDST 14 |
| Iriarte | Aguerrebere | 1916 | landa-langilea/campo | | | BDST 6 |
| Iridona | Camuzo | 1915 | campesino | | | BDST 14 |
| Irigüen | Zallo | 1916 | enplegatua/empleado | | | BDST 38 |
| Iriondo | - | 1916 | - | | | BDST 38 |
| Isasi | Aguirre | 1916 | okina /panadero | | | BDST 38 |
| Istosella | Pidemont | 1918 | - | | | BB.TT. 106 |
| Itrube | San Emeterio | - | - | | | BDST 38 |
| Iturburuaga | Sorozabal | 1918 | * | | | BB.TT. 3 |
| Iturmendi | Busto | 1915 | merkataria/comercio | | | BDST 6 |
| Iturregui | Garay | - | - | | | BDST 38 |
| Iturregui | Unibaso | 1916 | sukaldaria/cocinero | | | BDST 6 |
| Ivanoff | Vodenicharoff | - | - | | | Hospital Militar Disciplinario |
| Izaguirre | Aldai | 1916 | soldatzaile elektrikoa/soldador eléctrico | | | BDST 38 |
| Izaguirre | Arambarri | 1916 | jornalaria /jornalero | | | BDST 38 |
| Izquierdo | Laserna | 1916 | mariñela/marino | | | BDST 38 |
| Izquierdo | San Julián | 1916 | - | | | BB.TT. 106 |
| Izquierdo | de la Parra | 1915 | Estudiante | | | BDST 13 |