List of Famous people with last name Janszoon

Willem Janszoon, sometimes abbreviated to Willem Jansz., was a Dutch navigator and colonial governor. Janszoon served in the Dutch East Indies in the periods 1603–1611 and 1612–1616, including as governor of Fort Henricus on the island of Solor. He is the first European known to have seen the coast of Australia during his voyage of 1605–1606.

Jan Janszoon van Haarlem, commonly known as Reis Mourad the Younger, was a Dutch pirate in Morocco who converted to Islam after being captured by a Moorish state in 1618. He began serving as a pirate, one of the most famous of the 17th-century "Salé Rovers". Together with other corsairs, he helped establish the independent Republic of Salé at the city of that name, serving as the first President and Grand Admiral. He also served as Governor of Oualidia.