thumb|right|Share issued by Hope & Co. in 1804 to finance the Louisiana Purchase
Willem Willink (sometimes Wilhelm, Wilheim, or Wilhem) (1750 – 1841) was a wealthy Amsterdam merchant, and one of the investors in the Holland Land Company, and the Louisiana Purchase.
Biography
thumb|Herengracht 386
thumb|Summer home of Willem Willink on the [[Spaarne river]]
The Willink family came from Winterswijk and belonged to the Mennonite congregation. In 1775 when Willem married Hester Bierens he lived at Keizersgracht (near 268). He usually cooperated with his brother Jan (1778-1827). In 1791 they moved into a mansion at Herengracht close to Leidsegracht.
At the end of the 18th century, it became fashionable for Dutch businessmen and bankers to invest in the young United States, and many were talked into investing in land there after John Adams signed the trade treaty with the Netherlands in 1782. The group of investors in the Holland Land Company