|Seal of New Netherlands|
|Schepen of New Amsterdam|
|Commissioner for New Netherlands to the States-General|
|Born||1 May 1579|
Wolphert Gerretse (1 May 1579–1662), also known as Wolphert Gerretse Van Kouwenhoven and Wolfert Gerritsen Van Couwenhoven, was an original patentee, director of bouweries (farms), and a founder of the New Netherlands colony; founder of the first European settlement on Long Island, New Amersfoort, and a Schepen of New Amsterdam in 1654. "He played an active role in laying the foundations of the communities of Manhattan, Albany, Rensselaer, and Brooklyn."
Some descendants of Wolphert anglicized the surname "Van Kouwenhoven" to "Conover," as well as "Crownover", with Benjamin Conover (born 1822) being the first direct descendent (7th generation) to use "'Conover'" as his surname.
Dutch West India Company
Director of Bouweries for Kiliaen van Rensselaer
Following that service, in 1630 he returned to the Netherlands, where he entered into a contract with Kiliaen Van Rensselaer to return to the colony to manage his farms. Wolphert arrived back in the colony aboard the ship "Eendracht", where he proceeded in his duties as director for van Rensselaer's farms in Rensselaerwyck and Fort Orange. His contract was to run through 1636, but Gerretse requested it cancelled early so he could pursue his own interests. Rensselaer agreed. In 1632, Gerretse was released from his contractual obligations.
Shortly thereafter, he leased a bouwerie in New Amsterdam and managed it until 1636, when he was granted a patent of several hundred acres on Long Island. He called his plantation "Achervelt"; later it served as the founding of the town of New Amersfoort, named after Gerretse's original home. Today the area is known as Flatlands. His plantation was located near the current intersection of King's Highway and Flatbush Avenue.
In 2007 the deed of the granted land in Long Island was sold to a private collector for $156,000 becoming “one of the oldest Dutch documents in private hands.” The deed dated June 6th, 1663 is written in Dutch and outlines the purchase of the land (3,600-acre) from the Lenape Indians. 
In 1637, he became a Freeholder in Midwout, and again in 1641. In 1653, he was sent by the colony to the States-General in the Netherlands as a Commissioner. In 1654, Wolphert served as a Schepen of New Amsterdam, and in 1657 was made a Burgher. He served on the citizens council of Eight Men.
Marriage and children
- Jacob (b. 1612–1670)-assistant to Gov. Woulter Van Twiller, Representative at the Board of Nine in 1647, 1649–1650, sat on the Court of Arbitrators between 1649–1650, Delegate of New Netherlands to the Hague in Holland
- Pieter (b. 1614-d. 1699)-one of the first magistrates of New Netherlands, member of the Schepens Court 1653–1654, 1658–1659, 1661 and 1663, Delegate from New Amsterdam to the Convention of 1653, Lieutenant in the Esopus War, signer of the peace treaty 1664 with the Esopus Indians
- U.S. President Franklin D. Roosevelt
- U.S. President Theodore Roosevelt
- U.S. Senator Sidney Breese
- Astronomer John Monroe Van Vleck
- Governor William A. Newell (New Jersey) (founder United States Life-Saving Service)
- Nobel Prize winner John Hasbrouck Van Vleck
- Cardiology pioneer William B. Kouwenhoven
- Philanthropist Edward Harriman
- Diplomat William Harriman
- Railroad baron E.H. Harriman
- Vice-Admiral Arthur S. Carpender
- Actress Diana Douglas (née Diana Dill; mother of actor Michael Douglas)
- Actor Michael Douglas (by mother Diana)
- Honorary Consul of the Kingdom of Denmark, Christopher N. Smith
- "A century of banking in New York", p. 82; retrieved 25 October 2009.
- "Scannell New Jersey's First Citizens", p. 99; retrieved 25 October 2009.
- "Wolfert Gerritsen Van Couwenhoven and the Founding of New York," Journal of Long Island History 15:5–22, by Morton Wagman, 1979.
- Rhinebeck Lutheran Church Records, Rhinebeck, NJ and Tombstone Records of Cazenovia Cemetery, NY
- "Keeping Up With The Joneses", Jones NY History; retrieved 25 October 2009.
- "First Record Book", Society of the Daughters of Holland Dames, p. 103; retrieved 25 October 2009.
- "Manhattan 1624–1639", p. 5; retrieved 25 Oct 2009.
- "Conover Family", p. 7; retrieved 25 October 2009.
- Dutch deed fetches more than a handful of beads, cityroom.blogs.nytimes.com; 1 November 2007; retrieved 25 October 2009.
- "Hollanders who helped build America". Bernard Hubertus Maria Vlekke, Henry Beets. American Biographical Company, 1942. p. 196
- "Leaves From The Tree", p. 336; retrieved 25 October 2009.
- "Courts and Lawyers of New York: A History, 1609–1925". Alden Chester, E. Melvin Williams. The Lawbook Exchange, 2005. p. 235.
- "The Bronx in the frontier era", p. 46; retrieved 25 October 2009.
- "Descendants of Wolphert Gerretse Van Kouwenhoven", p. 292; retrieved 25 October 2009.
- "Descendants of Wolphert Gerretse Van Kouwenhoven", p. 417; retrieved 26 July 2012.
- "Descendants of Wolphert Gerretse Van Kouwenhoven", p. 1280; retrieved 25 October 2009.
- "Descendants of Wolphert Gerretse Van Kouwenhoven", p. 1005; retrieved 25 October 2009.