| Surname | Forename | Rank | Unit | Born | Resided |
| MASTERSON | Patrick | Gunner | Royal Horse Artillery and Royal Field Artillery | Born St. Thomas, Dublin | |
| MASTERSON | Patrick | Rifleman | Royal Irish Rifles | Born Dublin | |
| MATHEWS | James Joseph | Petty Officer | Drake Battalion, Royal Navy Division | | |
| MATHEWS | Isaac | Gunner | Royal Garrison Artillery | Born Portlarlington, Dublin | |
| MATTHEWS | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| MATTHEWS | Leopold David | Private | Royal Dublin Fusiliers | Born Dublin | |
| MATTHEWS | Patrick | Private | Royal Dublin Fusiliers | Born Dublin | |
| MATTHEWS | Peter | Sapper | Corps Of Royal Engineers | Born Dublin | |
| MATTHEWS | William Frederick Alexander | Private | Royal Dublin Fusiliers | Born Dublin | |
| MATTHEWS | James I. | Private | Irish Guards | Born Kilcoole, Co. Wicklow | Resided Rathmines, Co. Dublin |
| MAUNSELL | George Wyndham | Second Lieutenant | Indian Army Reserve of Officers, attached 2nd Queen Victoria's Own Sappers & Miners | Born Clare | |
| MAXWELL | James Ward | Private | 2nd Battalion, Canadian Infantry (Eastern Ontario Regiment) | Native of Edinburgh, Scotland | |
| MAXWELL | Henry | Captain | 13th Battalion, Cheshire Regiment | | |
| MAXWELL | Thomas | Second Lieutenant | 8th Battalion, Royal Dublin Fusiliers | | |
| MAXWELL | Arthur Reginald | Company Sergeant Major | Royal Dublin Fusiliers | Born Dublin | |
| MAXWELL | James | Corporal | Royal Irish Rifles | Born Dublin | |
| MAXWELL | William | Bombardier | Royal Garrison Artillery | Born Shoreham, Sussex | Resided Sandymount, Dublin |
| MAY | Henry Thomas | Private | 27th Battalion, Canadian Infantry (Manitoba Regiment) | | |
| MAY | George | Private | Cameronians (Scottish Rifles) | Born Dublin | Resided Gublin |
| MAY | John | Private | Worcestershire Regiment | Born Dublin | |
| MAY | John | Private | Royal Dublin Fusiliers | Born Crumlin, Co. Dublin | |
| MAY | Owen | Private | Royal Dublin Fusiliers | Born Dublin | |
| MAY | Paul Joseph Patrick | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| MAY | Robert | Private | East Yorkshire Regiment | Born Dublin | |
| MAY | Stanley | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Lew, Cornwall | |
| MAYCOCK | William | Private | Royal Dublin Fusiliers | Born Chapelizod, Co. Dublin | |
| MAYNE | Harry Augustus | Private | York And Lancaster Regiment | Born Dublin | Resided Cheriton, Kent |
| MAYNE | John | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| MAYSTON | William | Private | Royal Fusiliers (City of London Regiment) | Born Battersea | Resided Dublin |
| MCALEER | Peter | Lance Sergeant | Lancashire Fusiliers | Born Balbriggan, Co. Dublin | |
| McALLISTER | Frederick | Private | 13th Battalion, Canadian Infantry (Quebec Regiment) | Native of Dublin | |
| MCALLISTER | Samuel | Private | Royal Army Medical Corps | Born Dublin | |
| MCANLIFFE | Eugene | Lance Corporal | Duke of Edinburgh's (Wiltshire Regiment) | Born Dublin | Resided West Silvertown, Essex |
| MCAULEY | John | Private | Royal Dublin Fusiliers | Born Blanchardstown, Co. Dublin | |
| MCAULEY | Owen | Private | Royal Dublin Fusiliers | Born Lucan, Co. Dublin | |
| MCAULEY | Patrick | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Castleknock, Co. Dublin | Resided Castleknock, Co. Dublin |
| McBRIDE | John | Private | 13th Battalion, Canadian Infantry (Quebec Regiment) | | |
| MCBRIDE | James | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| MCBRIDE | John | Private | Royal Dublin Fusiliers | Born Chapelizod, Co. Dublin | |
| MCBRIEN | James | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| McCABE | Thomas | Able Seaman | H.M.S. "Tornado" | | |
| MCCABE | James | Acting Corporal | Royal Dublin Fusiliers | Born Dun Laoghaire, Co. Dublin | |
| MCCABE | Thomas | Private | King's (Liverpool Regiment) | Born Dublin | Resided Dublin |
| MCCABE | William | Private | Royal Irish Regiment | Born North Strand, Dublin | |
| McCALLUM | Patrick | Able Seaman | S.S. "Adela" (Dublin) | Born in Dublin | |
| McCANN | Christopher | Boatswain (Bosun) | S.S. "Marie Leonhardt" (London) | Born at Rush, Co. Dublin | |
| McCANN | John | Able Seaman | S.S. "Aylevarroo" (Limerick) | Born at Rush | |
| McCANN | Joseph Leo | Cook | S.S "Asturian" | | |
| McCANN | Pat | Leading Seaman | Nelson Battalion, Royal Navy Division | | |
| MCCANN | Alexander | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Crumlin, Co. Dublin | Resided Crumlin |