| Kurt Nielsen | April 3, 1925 | Born in København, Danmark | |
| M. Nielsen | May 13, 1916 | Born in Danmark | |
| Marius Chr. Nielsen | | Lived in Løgstør, Danmark | |
| Niels Nielsen | April 24, 1920 | Born in København, Danmark | |
| Niels J. Nielsen | February 28, 1915 | Born in Saltangerå, Færøyene | |
| Niels Marius Nielsen | July 1, 1891 | Born in Damsholt, Danmark | |
| Nils Juel Nielsen | June 5, 1914 | Born in København, Danmark | |
| Ole (Dion) Nielsen | April 30, 1852 | Born in Grimstad | |
| Orla Friis Nielsen | July 18, 1921 | Lived in Bernholm, Loland, Danmark | |
| Ove Juel Nielsen | April 11, 1922 | Lived in Gartnergade 17/4, København, Danmark | |
| Peder Kristian Nielsen | February 25, 1921 | Lived in Kirkegt. 114, Esbjerg, Danmark | |
| Poul Gerhard Nielsen | August 9, 1918 | Born in Fredriksborg, Danmark | |
| Preben Nielsen | September 28, 1920 | Born in København, Danmark | |
| Carl Nielsen Rasmussen | October 16, 1914 | Born in København | |
| Richard Leo Nielsen | May 13, 1916 | Born in Hellebæk, Danmark | |
| Roy Andreas Nielsen | March 6, 1918 | Born in Brooklyn, New York | |
| Sune Lennart Nielsen | January 14, 1913 | Born in Kristianstad, Sverige | |
| Svend Børre Nielsen | February 15, 1920 | Born in Ribe | |
| Søren Christian Nielsen | June 12, 1851 | Born in Danmark | |
| Søren Kristian Thomas Peter Nielsen | December 28, 1902 | Born in Troende Taasinge | |
| Thomas Nielsen | August 26, 1917 | Born in Kongshavn, Færøyene | |
| Thorald Martin Nielsen | September 18, 1922 | Lived in Dragør, Danmark | |
| Thoralf Nielsen | August 25, 1909 | Born in Horten | |
| Valdemar (Waldemar Theodor) Nielsen | December 26, 1885 | Born in København, Danmark | |
| Wiggo Nielsen | February 8, 1896 | Born in København, Danmark | |