| Surname | Forename | Rank | Unit | Born | Resided |
| HARE | George William | Private | Royal Dublin Fusiliers | Born Rush, Co. Dublin | |
| HARE | Henry | Sergeant | Royal Dublin Fusiliers | Born Dublin | |
| HARE | Stephen | Private | Welsh Regiment | Born Dublin | |
| HARFORD | Patrick | Boy | Fishing Vessel "Geraldine" (Howth) | Born at Howth | |
| HARKNESS | Andrew Michael | Private | Cameronians (Scottish Rifles) | Born St. Peter's, Dublin | Resided Dublin |
| HARLIN | Arthur Joseph | Lance Corporal | Royal Munster Fusiliers | Born Navan, Co. Meath | Resided Dublin |
| HARLING | Patrick | Lance Corporal | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| HARLING | Patrick | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| HARMAN | George | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| HARMAN | John | Driver | Royal Horse Artillery and Royal Field Artillery | Birthplace unknown | Resided Dublin |
| HARNETT | Ralph | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| HARNEY | Thomas | Private | Prince Of Wales's Own (West Yorkshire Regiment) | Born St. Kevens, Dublin | |
| HAROLD | Joseph | Private | Royal Dublin Fusiliers | Born Dublin | |
| HAROLD | Patrick | Driver | Royal Army Service Corps | Born Dublin | Resided Inchicore, Dublin |
| HAROLD | Stanley George | Sergeant | Connaught Rangers | Born Westminster, Middx. | Resided Dublin |
| HARPER | George Arthur | Lance Corporal | Queen's (Royal West Surrey Regiment) | Born Dublin, Ireland | Resided Dublin |
| HARPER | Herbert | Gunner | Royal Horse Artillery and Royal Field Artillery | Born Dublin | |
| HARPER | William | Private | Royal Warwickshire Regiment | Born Dublin | Resided Dupear, Sheffield |
| HARPUR | Edward Percival | Lieutenant | 7th Battalion, Royal Irish Fusiliers | | |
| HARPUR | Ernest | Private | Royal Inniskilling Fusiliers | Born Dun Laoghaire, Co. Dublin | |
| HARPUR | Walter | Private | Irish Guards | Born Dalkey, Co. Dublin | |
| HARRICH | John | Guardsman | Grenadier Guards | Born Dublin | |
| HARRINGTON | Daniel | Private | Royal Irish Regiment | Born St. James, Dublin | |
| HARRINGTON | Michael Walter | Trumpeter | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born St. Mary's, Mullingar | Resided Dublin |
| HARRIS | Eric Wallace | Lieutenant | 213th Siege Battery, Royal Garrison Artillery | | |
| HARRIS | Christopher | Lance Corporal | Royal Irish Rifles | Born Dublin | Resided Kingston, Co. Dublin |
| HARRIS | Edward | Private | Royal Dublin Fusiliers | Born Santry, Co. Dublin | |
| HARRIS | Edward | Private | Royal Dublin Fusiliers | Born Santry, Co. Dublin | Resided Santry |
| HARRIS | Henry George | Rifleman | Rifle Brigade (The Prince Consort's Own) | Born Dublin | Resided Maidstone, Kent |
| HARRIS | James | Private | Hampshire Regiment | Born St. Thomas, Dublin | Resided Dublin |
| HARRIS | James | Rifleman | Royal Irish Rifles | Born Dublin | |
| HARRIS | James | Sergeant | East Lancashire Regiment | Born Dublin | |
| HARRIS | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| HARRIS | John | Private | Royal Munster Fusiliers | Born Dublin | Resided Cork |
| HARRIS | John | Lance Corporal | Royal Irish Rifles | Born Dublin | |
| HARRIS | Reginald Kevin | Private | Worcestershire Regiment | Born Dublin | Resided Dublin |
| HARRIS | Thomas | Private | Royal Irish Regiment | Born St. Paul's, Dublin | |
| HARRISON | Frederick Alfred | Second Lieutenant | 3rd Battalion, Leinster Regiment, attached 6th Battalion, Royal Irish Regiment | | |
| HARRISON | Albert | Rifleman | Royal Irish Rifles | Born Dublin | |
| HARRISON | Henry | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | Resided Belfast |
| HARRISON | Herbert John | Private | Royal Dublin Fusiliers | Born Roebuck, Co. Dublin | Resided Gravesend, Kent |
| HARRISON | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| HARRISON | John George | Private | Essex Regiment | Born Dublin | Resided Ilford |
| HARRISON | Joseph | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | Resided Dublin |
| HARRISON | Thomas | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| HARROLD | John | Seaman | S.S. "Baku Standard" (Swansea) | Born at Dún Laoghaire, Co. Dublin | |
| HART | John Joseph | Fourth Engineer Officer | S.S. "Vienna" (Glasgow) | Born in Dublin | |
| HART | Richard John | Able Seaman | H.M.S. "Defence" | | |
| HART | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| HART | Joseph | Private | Royal Dublin Fusiliers | Born Dublin | |