Namesakes
Niels
(m) ?-1134 
Danish Kings and Queens 1104-1134
Nicolas Steno
(a.k.a. Niels) (m) 1638-1686
Notable Scientists and Inventors
Saints
Niels Henrik Abel
(m) 1802-1829
Notable Philosophers and Thinkers
Niels Neergaard
(m) 1854-1936
Danish Prime Ministers 1908-1909; 1920-1924
Niels Ryberg Finsen
(m) 1860-1904
Nobel Prize Winners 1903 (medicine)
Notable Scientists and Inventors
Niels Bohr
(m) 1885-1962
Nobel Prize Winners 1922 (physics)
Notable Scientists and Inventors
Niels Kaj Jerne
(m) 1911-1994
Nobel Prize Winners 1984 (medicine)
Aage Bohr
(middle name Niels) (m) 1922-2009
Nobel Prize Winners 1975 (physics)
Notable Scientists and Inventors
Niels Arestrup
(m) 1949-2024
Notable Actors and Entertainers (actor)
Niels "Noller" Olsen
(m) 1954-
Eurovision Song Contest Winners 2000 Denmark
Notable Musicians