| Surname | Forename | Rank | Unit | Born | Resided |
| MELLON | Richard | Rifleman | Royal Irish Rifles | Born Dublin | |
| MELLOY | Garnet Oyston | Acting Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| MERRICK | Thomas Barker | Captain | 4th Battalion, Machine Gun Corps Infantry | Born at Larne, Co. Antrim | |
| MERRIMAN | John | Private | King's (Liverpool Regiment) | Born Dublin | Resided Delvin, Westmeath |
| MERRY | Frederick Hanson | Corporal | 1st Battalion, Australian Infantry, Australian Imperial Force | Born in Dublin | |
| MEWS | William John | Corporal | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born Dublin | Resided Brixton Casrle |
| MEYER | Alan Wallace | Second Lieutenant | 289th Siege Battery, Royal Garrison Artillery | | |
| MEYERS | Vivian Mckenzie | Lance Corporal | Royal Inniskilling Fusiliers | Born Dublin | |
| MIDDLETON | Harry | Private | Lancashire Fusiliers | Born Dublin | Resided Dublin |
| MILES | Arthur | Private | 24th Battalion, Australian Infantry, Australian Imperial Force | Born in Dublin | |
| MILEY | Thomas | Private | Royal Dublin Fusiliers | Born Dublin | |
| MILLAR | Denis | Private | Connaught Rangers | Born Dublin | Resided Ballina, Co. Mayo |
| MILLAR | Edward Chaytor | Sergeant | Royal Dublin Fusiliers | Born Monkstown, Co. Dublin | Resided Monkstown |
| MILLAR | William | Private | Cheshire Regiment | Born Shankill, Co. Dublin | |
| MILLER | Alexander | Private | Royal Dublin Fusiliers | Born Dublin | |
| MILLER | George | Private | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born Clontarf, Dublin | |
| MILLER | Joseph | Private | Royal Dublin Fusiliers | Born Dublin | |
| MILLER | Robert Grattan | Company Quartermaster Sergeant | Oxfordshire and Buckinghamshire Light Infantry | Born St. Thomas, Dublin | |
| MILLER | Samuel | Sergeant | Oxfordshire and Buckinghamshire Light Infantry | Born Naul, Dublin | Resided Ballycullane, Ireland |
| MILLER | Thomas | Private | Royal Dublin Fusiliers | Born Dublin | |
| MILLER | Thomas | Sergeant | Princess Victoria's (Royal Irish Fusiliers) | Born Dun Laoghaire, Co. Dublin | Resided Dun Laoghaire |
| MILLIE | Bertrand | Private | Royal Scots (Lothian Regiment) | Born Dublin | Resided Edinburgh |
| MILLIE | Frederick Thornton | Private | Gordon Highlanders | Born Dublin | |
| MILLS | Henry Couper | Boy 1st Class | H.M.S. "Indefatigable" | Native of Dublin | |
| MILLS | Charles | Sergeant | Royal Dublin Fusiliers | Born Dublin | |
| MILLS | John | Private | Irish Guards | Born Dublin | |
| MILLS | John | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| MILLS | Michael | Rifleman | Royal Irish Rifles | Born Dun Laoghaire, Co. Dublin | Resided Monkstown, Co. Dublin |
| MILLYARD | Sidney | Company Quartermaster Sergeant | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Kilmainham, Co. Dublin | |
| MINOGUE | Martin | Sergeant | Royal Horse Artillery and Royal Field Artillery | Born Crumlin, Dublin | |
| MITCHELL | Francis Sidney | Lieutenant | Royal Army Medical Corps, attached 9th Battalion, Royal Sussex Regiment | | |
| MITCHELL | Edward Stephen | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| MITCHELL | Herbert | Private | Royal Dublin Fusiliers | Born Rathgar, Dublin | Resided Rathgar |
| MITCHELL | Joseph | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| MITCHELL | William Symes | Private | Machine Gun Corps | Born St. Judes, Dublin | |
| MITCHELL | Patrick Charles | Private | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born Roscommon | Resided Dublin |
| MITCHELL | Donald Osborne | Lance Corporal | Black Watch (Royal Highlanders) | Plymouth, Devonshire | Edenvale Road, Ranelagh, Dublin |
| MITCHELSON | Harry | Private | Prince of Wales's Own (West Yorkshire Regiment) | Born York | Resided Dublin |
| MITTEN | Martin | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| MOFFIT | William | Private | Royal Irish Regiment | Born Poole St., Dublin | |
| MOGIBNEY | John Joseph | Rifleman | Royal Irish Rifles | Born Dublin | |
| MOLLOY | Joseph Geale | Second Lieutenant | 1st Battalion, Norfolk Regiment | | |
| MOLLOY | David | Private | Royal Dublin Fusiliers | Born Dublin | |
| MOLLOY | James | Private | Lancashire Fusiliers | Born Dublin | Resided Pendlebury, Manchester |
| MOLLOY | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| MOLLOY | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| MOLLOY | John | Private | Alexandra, Princess of Wales's Own (Yorkshire Regiment) | Born Dublin | Resided Dublin |
| MOLONEY | James | Rifleman | Royal Irish Rifles | Born Dublin | |
| MOLONEY | Patrick | Private | Royal Dublin Fusiliers | Born Dublin | |
| MOLONEY | Peter | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |