* Willem Frederik Karel ( b. Berlin, 28 February 1797 – d. Wassenaar, 8 September 1881 ).

While a role for carbohydrates had been suspected, the link with wheat was not made until the 1940s by the Dutch paediatrician Dr. Willem Karel Dicke.

Even emperor Karel de Grote and King Willem II of Holland stayed at the little village on several occasions.

William IV, Prince of Orange-Nassau ( 1 September 1711 – 22 October 1751 ), born Willem Karel Hendrik Friso, was the first hereditary stadtholder of the Netherlands.

Mengelberg was born in Kiev in Ukraine, the son of the conductor Karel Mengelberg, who was himself the nephew of the conductor Willem Mengelberg.

Kuenen himself soon became one of the main supporters of the modern theology, of which JH Scholten and Karel Willem Opzoomer ( b. 1821 ) were the chief founders, and of which Leiden became the headquarters.

He was a popular teacher and his pupils were Abraham Begeyn, Johannes van der Bent, his son Nicolaes, Isaack Croonenbergh, Simon Dubois, Karel Dujardin, Johannes Glauber, Pieter de Hooch, Jacob van Huchtenburg, Justus van Huysum, Dirk Maas, Hendrick Mommers, Jacob Ochtervelt, and Willem Romeyn.

Image: Plakaat jan huygens walviskaak 1594. JPG | Plaque by Karel van Mander commemorating whalebone given to Haarlem by Jan Huyghen van Linschoten from Willem Barentsz expedition.

* Willem Karel van Dedem

* Willem Frederik Nicolaas Karel, son of Prince Frederick of the Netherlands ( 1834 )

Plaque painted by Karel van Mander commemorating whalebone given to Haarlem by Jan Huyghen van Linschoten from Willem Barentsz expedition.

nl: Frederik Karel van Hessen

In 1912, Karel Frederik Wenckebach saw a man with atrial fibrillation.

Type I is also named for Karel Frederik Wenckebach, and type II is also named for John Hay.

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Leopold III ( born as Léopold Philippe Charles Albert Meinrad Hubertus Marie Miguel ( French ) or Leopold Filips Karel Albert Meinrad Hubertus Maria Miguel ( Dutch ) or Leopold Philipp Karl Albert Meinrad Hubertus Maria Miguel ( German ); 3 November 1901 – 25 September 1983 ) reigned as King of the Belgians from 1934 until 1951, when he abdicated in favour of the heir apparent, his son Baudouin.

75 ( July – December 1923 ) Djuna Barnes, Pierre Bonnard, Van Wyck Brooks, Karel Čapek, Adolphe Dehn, André Derain, Roger Fry, Alyse Gregory, Knut Hamsun, Manuel Komroff, Alfred Kreymborg, Julius Meier-Graefe, Marie Laurencin, George Moore, Paul Morand, Luigi Pirandello, Bertrand Russell, Edward Sapir, Georges Seurat, Jean Toomer, William Carlos Williams, Edmund Wilson, Virginia Woolf

* February 27 – WWII – Battle of the Java Sea: An allied ( ABDA ) task force of 14 vessels under Dutch command, trying to stem a Japanese invasion of the Dutch East Indies, is defeated by a 19 vessel Japanese task force in the Java Sea ; 2. 300 sailors die, including the commander, admiral Karel Doorman ; Japanese attain naval hegemony in East-Asia

* February 28 – Karel Doorman, Dutch admiral ( sinking ship ) ( b. 1889 )

* April 23 – Karel Doorman, Dutch admiral ( d. 1942 )

* F930 Leopold I, Karel Doorman class frigate of the Naval Component of the Belgian Armed Forces

During the war the navy suffered heavy losses, especially in defending the Dutch East Indies, most notably the Battle of the Java Sea in which the commander, Dutchman Karel Doorman, went down with his ships together with 1000 of his crew.

Ms. Karel Doorman the Dutch navy consisted of two light cruisers ( two De Zeven Provinciën-class ), 12 destroyers ( four Holland class, eight Friesland class ), eight submarines, six frigates ( van Speijk class frigates ), and a considerable number of minesweepers.

In commemoration, the Royal Netherlands Navy named three ships after him: HNLMS Karel Doorman ( 1946 ), HNLMS Karel Doorman ( 1948 ) and HNLMS Karel Doorman ( 1991 ).

The medal was awarded to the Rear-Admiral's eldest son on May 23, 1947 by Lieutenant-Admiral Conrad Emil Lambert Helfrich, on board HNLMS Karel Doorman, attended by Prince Bernhard.

Between 1946 and 2006 the Royal Dutch Navy named three vessels after Karel Doorman, including a former British Colossus class aircraft carrier, the largest ship the Navy ever commissioned.

Karel Doorman is often honoured because he is said to have signalled " Ik val aan, volg mij " (" I attack, follow me ") during the Battle of the Java Sea, which was considered very gallant.

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* April 25 – Karel Appel, Dutch painter ( died 2006 )

Christiaan Karel Appel ( 25 April 1921 – 3 May 2006 ) was a Dutch painter, sculptor, and poet.

Karel Ančerl ( 11 April 1908 – 3 July 1973 ), was a Czech conductor, known for his performances of contemporary music and for his interpretations of music by Czech composers.

* April 29 – The Royal Netherlands Navy decommissions its last aircraft carrier, HNLMS Karel Doorman ( R81 ).

Karel Cornelia Constantijn Dillen ( 16 October 1925, Antwerp – 27 April 2007, Schilde ) was a Flemish politician and a Flemish nationalist.

* Karel Texa ( March 1938 – April 38 )

* Karel Böhm ( April 1938 – June 38 )

Jonkheer Karel Pieter Antoni Jan Hubertus ( Carel ) Godin de Beaufort ( 10 April 1934, Maarsbergen – 2 August 1964, Cologne, Germany ) was a Dutch nobleman and motor racing driver from the Netherlands.

Karel Verleye ( 17 April 1920-27 February 2002 ) co-founded the College of Europe in Bruges in 1949 with his good friend Hendrik Brugmans.

Karel Aguilar Chacón ( born 5 April 1980 ) is an athlete from Cuba.

Karel Berman ( 14 April 1919 in Jindřichův Hradec – 11 August 1995 in Prague ) was a Jewish Czech opera singer, composer and opera director.

Karel or Karl Bendl ( April 16, 1838 – September 20, 1897 ) was a Czech composer.