| Surname | Forename | Rank | Unit | Born | Resided |
| JEFFRESON | Clarence | Lieutenant | 2nd Canadian Mounted Rifles (British Columbia Regiment) attached 3rd Entrenching Battalion | | |
| JENKINS | Alexander | Private | Connaught Rangers | Born Dublin | Resided Sligo |
| JENKINS | Robert | Rifleman | Royal Irish Rifles | Born Dublin | Resided Belfast |
| JENNINGS | Joseph | Private | Royal Dublin Fusiliers | Born Dublin | |
| JENNINGS | William | Corporal | Royal Dublin Fusiliers | Born Dublin | |
| JENNINGS | Charles Henry | Private | East Surrey Regiment | Born Brentwood, Essex | Resided Dublin |
| JEPPS | John | Private | Labour Corps | Born St. Joseph's, Dublin | Resided Rathmines, Co. Dublin |
| JERVIS | Philip Charles | Acting Sergeant | Royal Munster Fusiliers | Born Dublin | Resided London, S.W. |
| JESSOP | Samuel | Sergeant | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | Resided Dublin |
| JOHN | William Richard | Private | Royal Dublin Fusiliers | Born Clonskea, Dublin | |
| JOHNS | Joseph | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| JOHNSON | Christopher | Private | Royal Army Service Corps | Born Dublin | Resided Cheltenham |
| JOHNSON | John | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Swords, Co. Dublin | |
| JOHNSON | William Charles | Private | Hampshire Regiment | Born Lambeth, London | Resided Dublin |
| JOHNSTON | William | Flight Sub-Lieutenant | | | |
| JOHNSTON | James Cecil | Captain | Royal Irish Fusiliers | | |
| JOHNSTON | Ernest J. | Sergeant | Royal Inniskilling Fusiliers | Born Dublin | |
| JOHNSTON | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| JOHNSTON | John Irwin | Lance Corporal | Royal Fusiliers (City of London Regiment) | Born Dublin | Resided Dublin |
| JOHNSTON | Joseph | Private | Irish Guards | Born Dun Laoghaire, Co. Dublin | |
| JOHNSTON | Patrick | Private | Buffs (East Kent Regiment) | Born Marlborough, St. Dublin | Resided Dublin, Ireland |
| JOHNSTON | William | Corporal | Royal Munster Fusiliers | Born St. George's, Dublin | Resided Dublin |
| JOHNSTON | William | Rifleman | Royal Irish Rifles | Born Dublin | |
| JOHNSTONE | Thomas | Private | Buffs (East Kent Regiment) | Born Rathmines, Dublin | Resided Woolwich, Kent |
| JOHNSTONE | William | Private | Royal Irish Regiment | Born Grangegorman, Co. Dublin | Resided Clontart, Co. Dublin |
| JONES | George | Able Seaman and Lamps | S.S. "Adela" (Dublin) | Born at Clintorp, Co. Dublin | |
| JONES | Michael | Able Seaman | S.S. "Memphian" (Liverpool) | | |
| JONES | Thomas | Fireman | S.S. "Adela" (Dublin) | Born in Dublin | |
| JONES | Kingsmill Williams | Captain | Royal Army Medical Corps, attached The Buffs (East Kent Regiment) | | |
| JONES | Edward | Rifleman | Royal Irish Rifles | Born Dublin | Resided Maryborough, Queen's Co. |
| JONES | Edward | Private | Royal Dublin Fusiliers | Born Dublin | |
| JONES | Francis | Rifleman | London Regiment | Born Dublin | Resided Cardiff |
| JONES | Frederick | Private | Royal Dublin Fusiliers | Born Dublin | |
| JONES | Henry | Gunner | Royal Horse Artillery and Royal Field Artillery | Born Dublin, Ireland | |
| JONES | Humphrey | Private | Royal Munster Fusiliers | Born Dublin | Resided London, S.E. |
| JONES | John | Private | Royal Dublin Fusiliers | Born Rathmines, Dublin | |
| JONES | Joseph Michael | Sergeant | Royal Army Service Corps | Born Dublin | Resided Gt. Malvern, Worcs |
| JONES | Samuel Henry | Sapper | Corps Of Royal Engineers | Born Dublin | |
| JONES | Thomas | Private | Bedfordshire Regiment | Born Dublin | Resided Watford, Herts |
| JONES | Thomas | Private | Royal Fusiliers (City Of London Regiment) | Born Dublin, Ireland | Resided Waterford |
| JONES | Edward | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Bandon, Co. Cork | Resided Dublin |
| JORDAN | Michael | Stoker 1st Class | H.M. Submarine "K5" | | |
| JORDAN | Andrew | Private | Royal Dublin Fusiliers | Born Dublin | |
| JORDAN | John | Private | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born St. Peter's, Dublin | Resided Dublin |
| JORDAN | Michael | Corporal | Royal Irish Rifles | Born Dublin | |
| JORDAN | Patrick | Private | Royal Dublin Fusiliers | Born Dublin | |
| JORDAN | Vincent | Lance Corporal | King's (Liverpool Regiment) | Born Killenmagh | Resided Dublin |
| JORDON | John | Rifleman | Royal Irish Rifles | Born Dublin | |
| JORDON | Lawrence | Private | Royal Warwickshire Regiment | Born St. Catherine, Dublin, Ireland | |
| JORDON | Thomas | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dun Laoghaire, Co. Dublin | |