Tjalling C. Koopmans (1910–1985) was a Dutch-born American economist who won the 1975 Nobel Prize in Economics for work on optimal resource allocation and linear programming, helping establish the field of mathematical economics.
Willem de Kooning (1904–1997) was a Dutch-born American painter and leading figure in Abstract Expressionism. Known for powerful, expressive works such as his Woman series, he became one of the most influential artists of the twentieth century.
Hans Koning (1921–2007), born Hans Koningsberger, was a Dutch-born American novelist, journalist, and screenwriter. A former member of the Dutch resistance during World War II, he later wrote widely for major magazines and newspapers.
Willem J. Kolff (1911–2009) was a Dutch-born physician and biomedical pioneer who invented the first practical artificial kidney and helped develop artificial organs, including early artificial heart technology, saving countless patients suffering from kidney and heart failure.
Harry Koch (1867–1942) was a Dutch immigrant, printer, and newspaper publisher in Quanah, Texas. He founded the Quanah Tribune-Chief and was the father of Fred C. Koch and grandfather of industrialists Charles and David Koch.
William I. Koch (born 1940) is an American businessman and entrepreneur who founded the Oxbow Group after selling his stake in Koch Industries. He is also known for financing the winning 1992 America’s Cup sailing team.
Frederick R. Koch (1932–2020) was an American collector, philanthropist, and eldest son of Koch Industries founder Fred C. Koch. Unlike his brothers, he pursued the arts, building major collections of rare books, manuscripts, and drawings.
Fred C. Koch (1900–1967) was an American chemical engineer and entrepreneur who developed innovative oil refining processes and founded businesses that evolved into Koch Industries, which later became the largest privately held corporation in the United States.
David H. Koch (1940–2019) was an American businessman, philanthropist, and executive vice president of Koch Industries. A co-owner of the company, he became widely known for major charitable donations supporting medical research, education, and cultural institutions.
Charles G. Koch (born 1935) is an American businessman and chairman of Koch Industries. Under his leadership, the company grew into the world’s largest privately held corporation, expanding from oil refining into diverse global industrial operations.
Herman Knickerbocker (1779–1855) was a New York lawyer, Federalist politician, and U.S. congressman who represented the Albany region from 1809 to 1811. A descendant of early Dutch settlers, he later managed the Knickerbocker family estate.
Peter Kiewit (1900–1979) was an American construction executive who transformed his family’s Omaha contracting firm into the global Kiewit Corporation. Under his leadership, the company built major infrastructure projects and became one of North America’s largest construction firms.
Jim Kaat (born 1938) is a Dutch American former Major League Baseball pitcher and broadcaster. Over a 25-year career he won 16 Gold Glove Awards and later became an Emmy-winning baseball analyst for NBC, ESPN, and the Yankees Network.
Willem Kieft (c.1597–1647) served as Director of New Netherland from 1638 to 1647. His authoritarian leadership and conflicts with settlers and Native Americans sparked Kieft’s War, leading to his recall by Dutch authorities.
Meindert De Jong (1906–1991) was a Dutch-born American author of children’s books who won the Newbery Medal for The Wheel on the School and the Hans Christian Andersen Medal for his lasting contributions to children’s literature.
John Jay (1745–1829) was a Founding Father, diplomat, jurist, and statesman who served as president of the Continental Congress, first Chief Justice of the United States, and governor of New York, shaping the early republic.
Tjalling C. Koopmans (1910–1985) was a Dutch-born American economist who won the 1975 Nobel Prize in Economics for work on optimal resource allocation and linear programming, helping establish the field of mathematical economics.
Willem de Kooning (1904–1997) was a Dutch-born American painter and leading figure in Abstract Expressionism. Known for powerful, expressive works such as his Woman series, he became one of the most influential artists of the twentieth century.
Hans Koning (1921–2007), born Hans Koningsberger, was a Dutch-born American novelist, journalist, and screenwriter. A former member of the Dutch resistance during World War II, he later wrote widely for major magazines and newspapers.
Willem J. Kolff (1911–2009) was a Dutch-born physician and biomedical pioneer who invented the first practical artificial kidney and helped develop artificial organs, including early artificial heart technology, saving countless patients suffering from kidney and heart failure.
Harry Koch (1867–1942) was a Dutch immigrant, printer, and newspaper publisher in Quanah, Texas. He founded the Quanah Tribune-Chief and was the father of Fred C. Koch and grandfather of industrialists Charles and David Koch.
William I. Koch (born 1940) is an American businessman and entrepreneur who founded the Oxbow Group after selling his stake in Koch Industries. He is also known for financing the winning 1992 America’s Cup sailing team.
Frederick R. Koch (1932–2020) was an American collector, philanthropist, and eldest son of Koch Industries founder Fred C. Koch. Unlike his brothers, he pursued the arts, building major collections of rare books, manuscripts, and drawings.
Fred C. Koch (1900–1967) was an American chemical engineer and entrepreneur who developed innovative oil refining processes and founded businesses that evolved into Koch Industries, which later became the largest privately held corporation in the United States.
David H. Koch (1940–2019) was an American businessman, philanthropist, and executive vice president of Koch Industries. A co-owner of the company, he became widely known for major charitable donations supporting medical research, education, and cultural institutions.
Charles G. Koch (born 1935) is an American businessman and chairman of Koch Industries. Under his leadership, the company grew into the world’s largest privately held corporation, expanding from oil refining into diverse global industrial operations.
Herman Knickerbocker (1779–1855) was a New York lawyer, Federalist politician, and U.S. congressman who represented the Albany region from 1809 to 1811. A descendant of early Dutch settlers, he later managed the Knickerbocker family estate.
Peter Kiewit (1900–1979) was an American construction executive who transformed his family’s Omaha contracting firm into the global Kiewit Corporation. Under his leadership, the company built major infrastructure projects and became one of North America’s largest construction firms.
Jim Kaat (born 1938) is a Dutch American former Major League Baseball pitcher and broadcaster. Over a 25-year career he won 16 Gold Glove Awards and later became an Emmy-winning baseball analyst for NBC, ESPN, and the Yankees Network.
Willem Kieft (c.1597–1647) served as Director of New Netherland from 1638 to 1647. His authoritarian leadership and conflicts with settlers and Native Americans sparked Kieft’s War, leading to his recall by Dutch authorities.
Meindert De Jong (1906–1991) was a Dutch-born American author of children’s books who won the Newbery Medal for The Wheel on the School and the Hans Christian Andersen Medal for his lasting contributions to children’s literature.
John Jay (1745–1829) was a Founding Father, diplomat, jurist, and statesman who served as president of the Continental Congress, first Chief Justice of the United States, and governor of New York, shaping the early republic.
