- Knud Knudsen (1812-1895) - Norwegian linguist
- Knud Knudsen (1832-1915) - Norwegian photographer
- Knud Leonard Knudsen (1879–1954) - Norwegian gymnast
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See also: Special:Categories/Knud Knudsen, Special:PrefixIndex/Category:Knud Knudsen and all pages with titles containing “Category:Knud Knudsen”