Claes CORNELISE or MENTELAER born in 1597 in Schowven, Teeld, Netherland.  He married Geertjen NANNICKS (born abt. 1599 in Netherland).

They had the following children:

Son, Peter CLAESSEN born in 1625 in Netherland.  He married Grietje VAN NESS.

Son, John CLAESSEN born abt. 1627 in Netherland.

Daughter, Trijntje CLAESSEN born abt. 1629 in Netherland.  She married Joris JACOBSEN

Son, Harpert CLAESSEN born abt. 1631 in Netherland.

Daughter, Geertie CLAESSEN born abt. 1635 in Flatlands, Long Island, NY.  She married Hendrick VOLCHERTSE on February 26, 1655.

Daughter, Pietertje CLAESSEN chr. October 28, 1640 in New York City, NY, NY.  She married Simon VAN ARSDALEN.

Son, Cornelis CLAESSEN chr. October 4, 1649 in New York City, NY, NY.

Son, Floris CLAESSEN chr. January 20, 1647 in New York City, NY, NY.

Son, Gerbrant CLAESSEN chr. April 4, 1649 in New York City, NY, NY.   He married Marrietje CLAES on August 25, 1674.  Gerbrant CLAESSEN was buried on June 19, 1703.

Son, Ariaen CLAESSEN chr. November 5, 1651 in New York City, NY, NY.   He was buried on April 5, 1703.

Son, William CLAESSEN (CLAWSON) born abt. 1657 in Flatlands, Long Island, NY.  He married Elsie Gerretz CROESEN on October 9, 1681.   William CLAESSEN (CLAWSON) died in 1724.  #2 Spouse of William- Mary ?