| Surname | Forename | Rank | Unit | Born | Resided |
| RILEY | William Vincent | Private | Royal Irish Regiment | Born Dublin | |
| RIMMER | James | Corporal | Border Regiment | Born Tuebrook, Liverpool, Dublin (Liverpool) | |
| RIPTON | William | Gunner | Royal Horse Artillery and Royal Field Artillery | Native of Dublin | Resided Dublin |
| RISSONE | Eugene | Rifleman | London Regiment | Born Dublin | Resided Soho |
| ROACH | James | Private | East Lancashire Regiment | Born Dublin | |
| ROACHE | John | Private | Royal Munster Fusiliers | Born St. Thomas's, Dublin | |
| ROACHE | John | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| ROBBINS | Thomas | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| ROBERTS | William John | Second Lieutenant | 1st Battalion, Royal Dublin Fusiliers | | |
| ROBERTS | Harold | Lance Corporal | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| ROBERTS | John Lester | Private | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born Dublin | |
| ROBERTS | Patrick | Private | Irish Guards | Born Baldoyle, Co. Dublin | |
| ROBERTSON | Walter Scott | Corporal | Devonshire Regiment | Born Dublin | |
| ROBINSON | Edmond | Captain | Royal Army Medical Corps, attached Seaforth Highlanders | | |
| ROBINSON | Henry | Lieutenant | 1st Aircraft Depot, Royal Air Force | | |
| ROBINSON | Daniel | Gunner | Royal Horse Artillery and Royal Field Artillery | Born Dublin, Ireland | |
| ROBINSON | George | Private | Royal Dublin Fusiliers | Born Dublin | |
| ROBINSON | George Edward | Drummer | Queen's (Royal West Surrey Regiment) | Born Dublin, Ireland | Resided Shorncliffe |
| ROBINSON | Godfrey | Private | King's Own Scottish Borderers | Born Phipsboro, Dublin | Resided Glasgow, Lanark |
| ROBINSON | Henry | Lance Corporal | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born St. Paul's, Dublin | Resided Dolphin's Barn |
| ROBINSON | James | Private | Irish Guards | Born Sandyford, Co. Dublin | |
| ROBINSON | James | Private | Irish Guards | Born Dublin | |
| ROBINSON | John | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Sandyford, Dublin | Resided Foxrock, Co. Dublin |
| ROBINSON | Robert | Sapper | Corps of Royal Engineers | Born St. Mary's, Dublin | |
| ROBINSON | Sinclair | Private | Royal Inniskilling Fusiliers | Born Dublin | |
| ROBINSON | William | Acting Corporal | Labour Corps | Born Dublin | |
| ROCHE | Hyacinth Joseph Albert | Captain | Royal Flying Corps and Royal Munster Fusiliers | | |
| ROCHE | Reverend. Francis Cavendish | Chaplain 4th Class | Army Chaplains' Deparment | Born at Dublin | |
| ROCHE | Edmund | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Cabinteeley, Co. Dublin | |
| ROCHE | Edward | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| ROCHE | Thomas | Corporal | King's (Liverpool Regiment) | Born Dublin | Resided Dublin |
| ROCHE | Thomas | Private | Royal Dublin Fusiliers | Born Crumlin, Co. Dublin | |
| ROCHE | William | Private | Prince Of Wales's Leinster Regiment (Royal Canadians) | Born Fairview, Co. Dublin | |
| ROCHE | P | Private | Royal Dublin Fusiliers | | |
| ROCHFORD | Charles | Private | Royal Dublin Fusiliers | Born Dublin | |
| ROCHFORD | James Joseph | Private | Royal Irish Regiment | Born Dublin | |
| ROCHFORD | Michael | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| ROCHFORD | Patrick | Gunner | Royal Garrison Artillery | Born Rathdrum, Co. Wicklow | Resided Dundrum, Co. Dublin |
| ROCK | Christopher | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| ROCK | James | Private | Royal Irish Regiment | Born St. Ann's, Dublin | Resided Blackrock, Co. Dublin |
| ROCK | Michael James | Gunner | Royal Horse Artillery and Royal Field Artillery | Born Dublin | |
| RODDEY | Thomas | Acting Corporal | Corps Of Royal Engineers | Born Dublin | |
| RODDICK | Robert | Sergeant | Royal Dublin Fusiliers | Born Dublin | |
| RODDY | Spencer Thomas | Lance Sergeant | Rifle Brigade (The Prince Consort's Own) | Born Dublin | Resided Ramsgate, Kent |
| RODGERS | George | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Rathfarnham, Co. Dublin | Acrebrook, Rathfarnham, Co. Dublin |
| RODGERS | Richard | Private | Machine Gun Corps | Born St. Peter's, Dublin | Acrebrook, Rathfarnham, Co. Dublin |
| ROE | John Windsor | Major | 185th Brigade, Royal Field Artillery | | |
| ROE | William | Private | Royal Dublin Fusiliers | Born Dublin | Resided Portarlington |
| ROGERS | Francis Lyttelton Lloyd | Second Lieutenant | Royal Field Artillery. | Born Coleraine, Co. Londonderry | |
| ROGERS | Richard Henry Lyster | Lieutenant | 32nd Brigade, Royal Field Artillery. | | |