List of Famous people named Nicolai

Nicolai Abraham Abildgaard was a Danish neoclassical and royal history painter, sculptor, architect, and professor of painting, mythology, and anatomy at the New Royal Danish Academy of Art in Copenhagen, Denmark. Many of his works were in the royal Christiansborg Palace, Fredensborg Palace, and Levetzau Palace at Amalienborg.

The Knight's Cross of the Iron Cross and its variants were the highest awards in the military and paramilitary forces of Nazi Germany during World War II. The Knight's Cross of the Iron Cross was awarded for a wide range of reasons and across all ranks, from a senior commander for skilled leadership of his troops in battle to a low-ranking soldier for a single act of extreme gallantry. A total of 7,321 awards were made between its first presentation on 30 September 1939 and its last bestowal on 17 June 1945. This number is based on the acceptance by the Association of Knight's Cross Recipients (AKCR). Presentations were made to members of the three military branches of the Wehrmacht—the Heer (Army), Kriegsmarine (Navy) and Luftwaffe —as well as the Waffen-SS, the Reich Labour Service, and the Volkssturm. There were also 43 foreign recipients of the award.

Nicolai Vladimirovich Krylov is a Russian mathematician specializing in partial differential equations, particularly stochastic partial differential equations and diffusion processes. Krylov studied at Lomonosov University, where he in 1966 under E. B. Dynkin attained a doctoral candidate title and in 1973 a Russian doctoral degree. He taught from 1966 to 1990 at the Lomonosov University and is since 1990 a professor at the University of Minnesota. At the beginning of his career he, in collaboration with Dynkin, worked on nonlinear stochastic control theory, making advances in the study of convex, nonlinear partial equations of 2nd order, which were examined with stochastic methods. This led to the Evans-Krylov theory, for which he received with Lawrence C. Evans in 2004 the Leroy P. Steele Prize of the American Mathematical Society. They proved the second order differentiability of the solutions of convex, completely nonlinear, second order elliptical partial differential equations and thus the existence of "classical solutions". He was in 1978 at Helsinki and in 1986 at Berkeley an Invited Speaker for the ICM. He received the Humboldt Research Award in 2001. In 1993 he was elected a member of the American Academy of Arts and Sciences (1993). He should not be confused with the mathematician Nikolay M. Krylov.

Nicolaj Bo Larsen is a former Danish cyclist. He is most notable for winning a stage of the 1996 Giro d'Italia and winning the Danish National Road Race Championships twice.

Nicolai Yuryevich Reshetikhin is a mathematical physicist, currently a professor of mathematics at the University of California, Berkeley and a professor of mathematical physics at the University of Amsterdam. His research is in the fields of low-dimensional topology, representation theory, and quantum groups. His major contributions are in the theory of quantum integrable systems, in representation theory of quantum groups and in quantum topology. He and Vladimir Turaev constructed invariants of 3-manifolds which are expected to describe quantum Chern-Simons field theory introduced by Edward Witten.

Nicolai Halby Wammen is a Danish politician of the Social Democrats who has been serving as Minister for Finance in the government of Prime Minister Mette Frederiksen since 2019. A native and lifelong resident of Denmark's second-largest city, Aarhus, he served as mayor. On the national level, he has served as Minister of European Affairs (2011–2013) and as Minister of Defence (2013–2015).

Nicolai Kielstrup is a Danish singer who participated in the Junior Eurovision Song Contest 2005.

Nicolai Johan Lohmann Krog was First Minister of Norway (1836-1855). He also held several other ministerial posts in the period 1821-1855 including Chief of the Ministry of the Army and Navy.