Knudsen is a surname of Scandinavian origin, derived from the personal name Knud (Canute) and literally meaning "Knud's son."
Knudsen refers to:
Persons
Bo Knudsen (born 1958), Danish politician
Gunnar Knudsen (1848–1928), Prime Minister of Norway 1908–1910 and 1913–1920
Jens Martin Knudsen (1930–2005), Danish astrophysicist
Jens Martin Knudsen (1967–), Faroese goalkeeper
Keith Knudsen (1948–2005), musician, member of The Doobie Brothers
Knud Knudsen (linguist) (1812–1895), Norwegian linguist
Konrad Knudsen (1890–1959), Norwegian painter, journalist, and parliamentarian
Lars John Knudsen (1932- 2004), Australian abstract painter
Lars Knudsen (1962–), Danish researcher in cryptography
Martin Knudsen (1871–1949), Danish physicist, after whom is named:
Knudsen Gas, scientific model for gases
Knudsen number, dimensionless number
Knudsen layer, layer between liquid and vapour
Morten Knudsen, (born 1995) Danish footballer
Per Holm Knudsen (contemporary), Danish author
Semon "Bunkie" Knudsen (1912–1998), American automobile industry executive
Sidse Babett Knudsen (born 1968), Danish actress
Tord Øverland Knudsen (born 1982), Norwegian musician
Valdemar Knudsen (1819–1898), Norwegian-American sugar planter on Hawaii, entrepreneur
Vern Oliver Knudsen, (1893–1974), American acoustical physicist
William S. Knudsen (1879–1948), Danish American automobile industry executive, US Army General
Other
Knudsen, a brand of dairy products, currently owned by Kraft Foods
