| Surname | Forename | Rank | Unit | Naval_Service |
| DAME | A | Boatswain & Lamps (Bosun) | S.S. "Llongwen" (Cardiff) | Mercantile Marine |
| DANIEL | Thomas | 2nd Steward | S.S. "East Wales" (Cardiff) | Mercantile Marine |
| DAVEY | Edward | Stoker 1st Class | H.M.S. "Monmouth" | Royal Navy |
| DAVEY | Frederick | Seaman | S.S. "Adela" | Royal Naval Reserve |
| DAVEY | Sam | Able Seaman | S.S. "Braefield" (Dublin) | Mercantile Marine |
| DAWSON | P | Cattleman | S.S. "Alnwick Castle" (London) | Mercantile Marine |
| DAY | Elystan Tidmarsh | Midshipman | H.M.S. "Caronia" | Royal Naval Reserve |
| DEANE | Thomas Alexander David | Lieutenant | Portsmouth Battalion, Royal Navy Division | Royal Marine Light Infantry |
| DEVINE | Patrick | Able Seaman | S.S. "Palmella" (Liverpool) | Mercantile Marine |
| DEVLIN | George | Steward | S.S. "Coonagh" (Limerick) | Mercantile Marine |
| DEVLIN | James | Sailor | S.S. "Wathfield" (West Hartlepool) | Mercantile Marine |
| DICKINSON | Joseph | Master | Alacrity | Mercantile Marine |
| DOHERTY | Andrew | Stoker 1st Class | H.M.S. "Indefatigable" | Royal Navy |
| DOHERTY | Michael | Stoker | H.M.S. "Queen Mary" | Royal Naval Reserve |
| DONNELLY | Patrick | Stoker 1st Class | H.M.S. "Vanguard" | Royal Navy |
| DONOVAN | Stephen | Private | Plymouth Battalion, Royal Navy Division | Royal Marine Light Infantry |
| DOWD | Patrick Joseph | Fireman and Trimmer | S.S. "Howth Head" (Belfast) | Mercantile Marine |
| DOWLING | John Joseph | Stoker 2nd Class | H.M.S. "Victory" | Royal Navy |
| DOWLING | Patrick | Shipwright 2nd Class | H.M.S. "Monmouth" | Royal Navy |
| DOWSE | Richard Henry | Chief Engineer | S.S. "Towneley" (Newcastle) | Mercantile Marine |
| DOYLE | Joseph Thomas | Ship's Cook | S.S. "Highbury" (London) | Mercantile Marine |
| DOYLE | Thomas Joseph | Private | 2nd Royal Marine Battalion, Royal Navy Division | Royal Marine Light Infantry |
| DOYLE | Thomas | Quartermaster | S.S. "Cork" (Dublin) | Mercantile Marine |
| DUGGAN | J | Pantryman | S.S. "Jacona" (Dundee) | Mercantile Marine |
| DUNNE | George Joseph | Boatswain's Mate | S.S. "Royal Edward" (Toronto) | Mercantile Marine |
| DUNNE | John Joseph | Petty Officer Stoker | H.M.S. "Nessus" | Royal Navy |
| DUNNE | Joseph | Able Seaman | H.M. Submarine "D5" | Royal Navy |
| DUNNE | Thomas Ambrose | Seaman | H.M.S. "Bayano" | Royal Naval Reserve |
| DUNPHY | Michael | Stoker 1st Class | Nelson Battalion, Royal Navy Division | Royal Navy |
| DUPPEL | John | Able Seaman | S.S. "William Middleton" (Sunderland) | Mercantile Marine |
| EASTON | C R | Petty Officer Stoker | H.M.S. "Vivid" | Royal Navy |
| EASTON | Charles Robert | Able Seaman | H.M.S. "Vivid" | Royal Navy |
| EDWARDS | Arthur Evan | Fourth Engineer Officer | S.S. "Sculptor" (Liverpool) | Mercantile Marine |
| FARRELL | James | Cattleman (Asst.) | S.S. "Adela" (Dublin) | Mercantile Marine |
| FARRELL | James | Second Mate | S.S. "Polesley" (London) | Mercantile Marine |
| FARRELL | Laurance | Fireman | S.S. "Kennington" (London) | Mercantile Marine |
| FARRELLY | Thomas | Able Seaman | S.S. "Memphian" (Liverpool) | Mercantile Marine |
| FARREN | Christopher | Able Seaman | Fishing Vessel "Geraldine" (Howth) | Mercantile Marine |
| FARREN | Michael | Fireman | S.S. "Solway Queen" (Aberdeen) | Mercantile Marine |
| FAY | Michael | Stoker 1st Class | H.M.S. "Brisk" | Royal Navy |