Kliment Yefremovich Voroshilov, popularly known as Klim Voroshilov, was a prominent Soviet military officer and politician during the Stalin-era. He was one of the original five Marshals of the Soviet Union, the highest military rank of the Soviet Union, and served as Chairman of the Presidium of the Supreme Soviet, the nominal Soviet head of state, from 1953 to 1960.

Raijmondus "Raymond" Godefriedus Norbert van de Klundert is a Dutch author. He is well known for his novel Love Life, in which he documents a fictionalized version of his own life story; a husband committing adultery while his wife is dying of cancer.

Klym Lavrynovych Polishchuk was a Ukrainian journalist, poet and writer.

Klymentyna Karlivna Popovych-Boiarska was a Ukrainian writer, poet, and elementary school teacher born in Galicia. She was active in the Ukrainian women's movement, and wrote alongside Ivan Franko and Nataliya Kobrynska.

Klyne Ryland Snodgrass is an American theologian and author, who served as professor of New Testament Studies at the North Park Theological Seminary in Chicago, Illinois from 1974 to 2015. His publication Stories with Intent: A Comprehensive Guide to the Parables of Jesus garnered a 2009 Christianity Today Book Award.

Knud Knudsen was a Norwegian educator, author, linguist and philologist, known as "The Father of Bokmål". He is best known for having assembled from Dano-Norwegian one of the two official written versions of the Norwegian language, Bokmål, one of the two official written versions of the Norwegian language.

Knud Lyne Rahbek was a Danish literary historian, critic, writer, poet and magazine editor.

Knud Johan Victor Rasmussen was a Greenlandic–Danish polar explorer and anthropologist. He has been called the "father of Eskimology" and was the first European to cross the Northwest Passage via dog sled. He remains well known in Greenland, Denmark and among Canadian Inuit.

Knut Faldbakken (born 31 August 1941, in Hamar) is a Norwegian novelist.

Knut Gjerset was a Norwegian-American author, historian and college professor.