| Nielsen, Roma | Roma Nielsen | Actor | 1924 | 1 | |
| Nielsen, Poul | Poul Nielsen | Actor, Director | 1885 - 1937 | 16 | 1 |
| Nielsen, Pil | Pil Nielsen | Actor | 2013 | 1 | |
| Nielsen, Peter Even | Peter Even Nielsen | Actor | 1853 - 1862 | 5 | 1 |
| Nielsen, Peter | Peter Nielsen | Actor | 1856 - 1888 | 22 | 1 |
| Nielsen, Peter | Peter Nielsen | Actor | 1922 | 1 | |
| Nielsen, Otto | Otto Nielsen | Actor | 1909 | 25 | |
| Nielsen, Oda | Oda Nielsen | Actor | 1871 - 1907 | 23 | 2 |
| Nielsen, Nathalie | Nathalie Nielsen | Actor | 1901 - 1902 | 12 | |
| Nielsen, Mr. | Mr. Nielsen | Actor | 1877 - 1885 | 5 | |
| Nielsen, Mogens Frohn | Mogens Frohn Nielsen | Actor | 1999 | 1 | |
| Nielsen, Mette, Sofie | Mette Sofie Nielsen | Adaptation | 1979 | 1 | 1 |
| Nielsen, Meentje | Meentje Nielsen | Costume Designer | 2014 - 2016 | 3 | |
| Nielsen, Mathilde | Mathilde Nielsen | Actor | 1898 - 1926 | 3 | 1 |
| Nielsen, Martinius | Martinius Nielsen | Actor | 1886 - 1911 | 21 | 2 |
| Nielsen, Marie | Marie Nielsen | Actor | 1913 | 4 | |
| Nielsen, Marianne | Marianne Nielsen | Actor | 1985 - 2018 | 83 | 1 |
| Nielsen, Mari Lange | Mari Lange Nielsen | Actor | 1995 | 1 | |
| Nielsen, Mads, M. | Mads M. Nielsen | Actor | 2008 | 1 | 2 |
| Nielsen, Lisa | Lisa Nielsen | Dancer | 2017 | 1 | |
| Nielsen, Linda | Linda Nielsen | Actor | 1994 | 1 | |
| Nielsen, Leslie | Leslie Nielsen | Actor | 1959 - 1960 | 2 | |
| Nielsen, Leonora Alexandra | Leonora Alexandra Nielsen | Actor | 1993 | 1 | |
| Nielsen, Lars Emil | Lars Emil Nielsen | Actor, Dancer | 2017 - 2019 | 2 | 1 |
| Nielsen, Kurt, Erik | Kurt Erik Nielsen | Actor | 1960 | 1 | |
| Nielsen, Kristine | Kristine Nielsen | Actor | 1983 | 4 | |
| Nielsen, Klaus | Klaus Nielsen | Actor | 1960 | 1 | |
| Nielsen, Kim | Kim Nielsen | Costume Designer, Designer | 2004 | 2 | 1 |
| Nielsen, Kenn, Lund | Kenn Lund Nielsen | Director, Producer | 2008 | 2 | |
| Nielsen, Katja | Katja Nielsen | Actor | 2013 | 1 | |
| Nielsen, Jørgen | Jørgen Nielsen | Actor | 1983 | 1 | |
| Nielsen, Johannes | Johannes Nielsen | Actor, Director | 1901 - 1928 | 21 | 1 |
| Nielsen, Jean | Jean Nielsen | Actor | 1850 | 1 | |
| Nielsen, Jakob | Jakob Nielsen | Actor | 1936 - 1975 | 7 | 1 |
| Nielsen, J. P. L. | J. P. L. Nielsen | Actor | 1864 - 1869 | 3 | 1 |
| Nielsen, Ingeborg | Ingeborg Nielsen | Costume Designer | 1976 - 1978 | 52 | |
| Nielsen, Ib | Ib Nielsen | Actor | 1953 | 1 | |
| Nielsen, Håkon Thorstensen | Håkon Thorstensen Nielsen | Actor | 2013 - 2017 | 2 | |
| Nielsen, Hr. | Hr. Nielsen | Actor | 1877 - 1886 | 9 | |
| Nielsen, Holger | Holger Nielsen | Lighting Designer | 1935 - 1956 | 2 | |
| Nielsen, Helga | Helga Nielsen | Actor | 1928 | 1 | |
| Nielsen, Helena | Helena Nielsen | Actor | 2003 | 1 | 1 |
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