Karel Jaromír Erben was a Czech folklorist and poet of the mid-19th century, best known for his collection Kytice, which contains poems based on traditional and folkloric themes.
Karel Kaplan was a Czech historian. He specialized in the World War II and post-World War II periods in Czechoslovakia. He wrote books about Czech political trials during the 1950s, the situation of Jews in Central Europe during World War II, and the Communist takeover in Czechoslovakia.
Karel Kosík was a Czech Marxist philosopher. In his most famous philosophical work, Dialectics of the Concrete (1963), Kosík presents an original reinterpretation of the ideas of Karl Marx in light of Martin Heidegger's phenomenology. His later essays can be called a sharp critique of the modern society from a leftist but not strictly Marxist position.
Karel Kryl was an iconic Czechoslovak poet, singer-songwriter and author of many hit protest songs in which he identified and attacked the hypocrisy, stupidity and inhumanity of the Communist regime in his home country.
Karel Lambert is an American philosopher and logician at the University of California, Irvine and the University of Salzburg. He has written extensively on the subject of free logic, a term which he coined.
Karel Lodewijk Ledeganck was a Flemish writer. He was of humble origin, but became extraordinary Professor at the University of Ghent. He started his career as a clerk, then became a judge, and school inspector before he came to teach at the university.
