List of Famous people named Ivar

Ivar Giaever is a Norwegian-American physicist who shared the Nobel Prize in Physics in 1973 with Leo Esaki and Brian Josephson "for their discoveries regarding tunnelling phenomena in solids". Giaever's share of the prize was specifically for his "experimental discoveries regarding tunnelling phenomena in superconductors". Giaever is a professor emeritus at the Rensselaer Polytechnic Institute and the president of the company Applied Biophysics.

Ivar I. Ekeland is a French mathematician of Norwegian descent. Ekeland has written influential monographs and textbooks on nonlinear functional analysis, the calculus of variations, and mathematical economics, as well as popular books on mathematics, which have been published in French, English, and other languages. Ekeland is known as the author of Ekeland's variational principle and for his use of the Shapley–Folkman lemma in optimization theory. He has contributed to the periodic solutions of Hamiltonian systems and particularly to the theory of Kreĭn indices for linear systems. Ekeland helped to inspire the discussion of chaos theory in Michael Crichton's 1990 novel Jurassic Park.

Ivar Eugen Ballangrud was a Norwegian speed skater, a four-time Olympic champion in speed skating. As the only triple gold medalist at the 1936 Winter Olympics, Ballangrud was the most successful athlete there.

Ivar Brogger is an American actor of stage, motion pictures and television. He is known for his appearances in several TV shows like 24, NCIS, Star Trek: Voyager, Private Practice and a recurring role in Invasion. He had small roles in motion pictures like Dreamgirls, Ocean's Thirteen and Little Children.