| Surname | Forename | Rank | Unit | Born | Resided |
| HALLIGAN | William | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| HALPIN | Patrick | Able Seaman | S.S. "Adela" (Dublin) | Born at Dún Laoghaire | |
| HALPIN | William Oswald | Captain | Royal Army Medical Corps, attached 4th (Queen's Own) Hussars | | |
| HALPIN | Christopher | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| HALPIN | Jack | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| HAMILTON | Alexander | Private | Royal Dublin Fusiliers | Born Dublin | |
| HAMILTON | Frederick | Private | Royal Dublin Fusiliers | Born Dublin | |
| HAMILTON | John | Lance Corporal | Scots Guards | Born Dublin | Resided Dublin |
| HAMILTON | Patrick | Lance Corporal | Royal Dublin Fusiliers | Born Balbriggan, Co. Dublin | Resided Balbriggan |
| HAMILTON | William | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| HAMMOND | R W | Lieutenant Colonel | Royal Engineers | | |
| HAMMOND | Patrick | Lance Corporal | Princess Victoria's (Royal Irish Fusiliers) | Born Balbriggan, Co. Dublin | Resided Balbriggan |
| HAMP | Wilfred Ernest | Company Sergeant Major | Lincolnshire Regiment | Born Dublin | Resided Derby |
| HAMPTON | John | Private | Seaforth Highlanders (Rossshire Buffs, the Duke of Albany's) | Born St. Mary's, Dublin, Co. Antrim | |
| HAMPTON | Thomas | Guardsman | Scots Guards | Born Dublin | |
| HANCOCK | John Henry | Second Lieutenant | Corps of Royal Engineers | Born Rathmines, Dublin | |
| HANCOCK | Thomas Francis | Private | Royal Irish Regiment | Born Rathmines, Co. Dublin | Resided Rathmines |
| HAND | Charley | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| HAND | Christopher | Sergeant | Machine Gun Corps | Born St. Peter's, Dublin | |
| HAND | John | Private | King's (Liverpool Regiment) | Born Dublin | Resided Dublin |
| HANDS | Michael | Mate | S.V. "Frances" (Carnarvon) | Born in Dublin | |
| HANLEY | James | Private | Royal Dublin Fusiliers | Born Swords, Co. Dublin | Resided Swords |
| HANLEY | Joseph | Private | Machine Gun Corps | Born Dublin | |
| HANLEY | Michael | Private | Royal Dublin Fusiliers | Born Dublin | |
| HANLEY | Michael | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Loughlinstown, Co. Dublin | Resided Dublin |
| HANLEY | Owen | Private | Royal Dublin Fusiliers | Born Kilmessan, Co. Meath | Resided Rathcoole, Co. Dublin |
| HANLON | James | Second Mate | S.S. "Bray Head" (Belfast) | Born at Dún Laoghaire | |
| HANLON | Christopher | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| HANLON | James | Gunner | Royal Horse Artillery and Royal Field Artillery | Born Dublin | |
| HANLON | Luke | Company Sergeant Major | Royal Inniskilling Fusiliers | Born St. Kevins, Dublin | |
| HANLON | Patrick | Private | Connaught Rangers | Born Dublin | Resided Athlone, Co. Westmeath |
| HANLON | Terence | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| HANLON | William | Private | Royal Dublin Fusiliers | Born Dublin | |
| HANLON | William | Private | Royal Dublin Fusiliers | Born Dublin | |
| HANN | William | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| HANNA | William | Sergeant | Princess Victoria's (Royal Irish Fusiliers) | Born Shankill, Belfast | Resided Skerries, Co. Dublin |
| HANNAM | Sydney George | Apprentice | S.S. "Romford" (London) | Born at Beckenham, Kent | |
| HANNIGAN | Thomas | Rifleman | Royal Irish Rifles | Born Dublin | |
| HANNON | James | Carpenter | Artist (Liverpool) | Born in Dublin | |
| HANNON | Michael | Private | Royal Dublin Fusiliers | Born Dublin | Resided Brannoxtown, Co. Kildare |
| HANNON | Patrick | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| HANTON | John C. | Private | Irish Guards | Born Dublin | |
| HARBOURNE | George | Lance Corporal | Royal Inniskilling Fusiliers | Born Finglas, Co. Dublin | |
| HARDING | George | Sergeant | Irish Guards | Born Dublin | |
| HARDING | Richard | Acting Corporal | King's Own (Yorkshire Light Infantry) | Born St. Paul's, Dublin | |
| HARDY | Cornelius | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| HARDY | Harry | Private | King's (Liverpool Regiment) | Born Dublin | Resided Dublin |
| HARE | George | Lieutenant | D Company 7th Battalion, Royal Dublin Fusiliers | | |
| HARE | Albert K. | Private (Lance Corporal) | Royal Irish Regiment | Born North Strand, Dublin | |
| HARE | Edward | Sergeant | Royal Dublin Fusiliers | Born Dublin | |