Namesakes
Asta Nielsen
(f) 1881-1972 
Notable Actors and Entertainers (actor)
Ingar Nielsen
(m) 1885-1963
Olympic Medalists 1920; 1924 sailing (gold)
Aksel Sandemose
(a.k.a. Nielsen) (m) 1899-1965
Notable Writers
Børge Raahauge Nielsen
(m) 1920-2010
Olympic Medalists 1948 rowing (bronze)
Leslie Nielsen
(m) 1926-2010
Notable Actors and Entertainers (actor)
Peer Nielsen
(m) 1942-
Olympic Medalists 1964 canoe sprint (bronze)
Rick Nielsen
(m) 1948-
Rock and Roll Hall-of-Famers 2016 Cheap Trick
Brigitte Nielsen
(f) 1963-
Notable Actors and Entertainers (actor)
Connie Nielsen
(f) 1965-
Notable Actors and Entertainers (actor)
Benny Nielsen
(m) 1966-
Olympic Medalists 1988 swimming - 200 m butterfly (silver)
Bárður á Steig Nielsen
(m) 1972-
Other Leaders 2019-2022 Faroe Islands (prime minister)
Joachim Fischer Nielsen
(m) 1978-
Olympic Medalists 2012 badminton mixed doubles (bronze)
Sanna Nielsen
(f) 1984-
Notable Musicians
Jens-Frederik Nielsen
(m) 1991-
Other Leaders 2025- Greenland (prime minister)