| Surname | Forename | Rank | Unit | Born | Resided |
| MAHONEY | Henry | Private | Royal Dublin Fusiliers | Born Dublin | |
| MAHONEY | James | Private | Irish Guards | Born Dublin | |
| MAHONEY | Myles | Private | Royal Dublin Fusiliers | Born Dublin | |
| MAHONEY | Patrick | Gunner | Royal Garrison Artillery | Born St. Thomas, Dublin | |
| MAHONEY | Patrick | Private | Northumberland Fusiliers | Born Dublin | |
| MAHONEY | Harry | Private | Lancashire Fusiliers | Born Cork | Resided Kingstown, Co. Dublin |
| MAHONY | Bernard | Stoker 1st Class | H.M.S. "Raglan" | Native of Dún Laoghaire | |
| MAHONY | Edmund Joseph | Lieutenant | Royal Munster Fusiliers | | |
| MAHONY | John | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dun Laoghaire, Co. Dublin | |
| MAHONY | Iza | Civilian | Voluntary Aid Detachment | | |
| MAINWARING | Thomas | Private | Royal Irish Regiment | Born Blackrock, Co. Dublin | Resided Booterstown, Co. Dublin |
| MALES | Robert William | Lance Sergeant | Devonshire Regiment | Born Dublin | |
| MALLEY | Charles Spencer | Corporal | 25th Battalion, Australian Infantry, Australian Imperial Force | Native of Dublin | |
| MALLEY | H | Private | 28th Battalion, Canadian Expeditionary Force | | |
| MALLIN | William | Sergeant | Prince Of Wales's Volunteers (South Lancashire Regiment) | Born Dublin | |
| MALLINS | Claude Joseph O'Conor | Lieutenant | 2nd Battalion, Connaught Rangers | | |
| MALLON | C S | Serjeant Major | Royal Irish Rifles attached 1st/5th King's African Rifles | | |
| MALLON | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| MALLOY | Patrick | Private | Royal Inniskilling Fusiliers | Born Dublin | |
| MALONE | Henry | Guardsman | Scots Guards | Born Rathmines, Dublin | Resided Dublin |
| MALONE | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| MALONE | Patrick | Guardsman | Guards Machine Gun Regiment | Born St. Catherine's, Dublin | |
| MALONE | Patrick | Lance Corporal | Army Cyclist Corps | Born Dublin | |
| MALONE | Patrick | Private | Royal Dublin Fusiliers | Born Dublin | |
| MALONE | Thomas | Private | Royal Dublin Fusiliers | Born Dublin | |
| MALONE | William | Sergeant | Royal Dublin Fusiliers | Born Dublin | |
| MALONE | Matthew | Private | Connaught Rangers | Birthplace unknown | Resided Dublin |
| MALONEY | John Thomas | Corporal | Royal Dublin Fusiliers | Born Dublin | |
| MANGAN | Frederick Dennis | Private | 9th Battalion, Australian Infantry, Australian Imperial Force | | |
| MANGAN | J | Private | 10th Battalion, Canadian Infantry (Alberta Regiment) | | |
| MANGAN | Michael Edward | Private | 116th Battalion, Canadian Infantry (Central Ontario Regiment) | | |
| MANGAN | Frank | Fireman | S.S. "Adela" (Dublin) | Born in Dublin | |
| MANGAN | G | Wireless Operator | S.S. "Clangula" (Cork) | Born at Limerick | |
| MANGAN | John | Stoker | H.M.S. "Queen Mary" | | |
| MANGAN | Christopher | Private | Duke of Cornwall's Light Infantry | Born Dublin, Ireland | |
| MANGAN | Edward | Private | Royal Dublin Fusiliers | Born Dublin | |
| MANGAN | John James | Lance Corporal | Prince of Wales's Own (West Yorkshire Regiment) | Born St. George's, Dublin | Resided York |
| MANGAN | Thomas | Rifleman | Royal Irish Rifles | Born Dublin | |
| MANGAN | William | Private | Manchester Regiment | Born St. Thomas, Dublin | |
| MANLY | Eric Cecil John | Lieutenant | B Battery, 82nd Brigade, Royal Field Artillery | | |
| MANN | William | Lance Corporal | 3rd Battalion, Australian Infantry, Australian Imperial Force | | |
| MANNING | Joseph Michael | Able Seaman | S.S. "Adela" (Dublin) | Born at Dublin | |
| MANNING | Robert Charles | Major | Corps of Royal Engineers | Born Dublin | |
| MANNING | Charles | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| MANNING | Martin | Private | Royal Munster Fusiliers | Born St. Andrew's, Dublin | Resided Dublin |
| MANNING | Michael | Private | Royal Dublin Fusiliers | Born Dublin | |
| MANNING | William Joseph | Private | Royal Dublin Fusiliers | Born Stillorgan, Co. Dublin | |
| MANNIX | James Francis | Boy 1st Class | H.M.S. "Viknor" | | |
| MANSFIELD | James | Master | Kangaroo | | |
| MANSFIELD | Harold Barton | Second Lieutenant | 10th Battalion, Royal Dublin Fusiliers | | |