From Abstracts of Wills on File in the Surrogate's Office, City of New York, Volume 5, p56.

Gerritt Post's will was dated 31 October 1750, although he lived until 1756, when a final codicil was appended to the will.  In it he refers directly to his daughter "Klaartise" as the wife of Peter DeGroot.  The Posts were then, and are today, among the more prominent New York families.

 Page 56.--In the name of God, Amen, "the 31 day of 8ber, 1750." I, GERRITT POST, of Staten Island, Gent., being very weak. I leave to my wife Francyntie, during her life, all my messuages, lands, and tenements, goods and chattels. After her death I give all my lands and messuages where I now dwell unto my two sons, Gerritt and Peter Post, and they are to pay to their brother and their sisters £300, viz., to my son Johanes, and my daughters, Geesie, Catharine, and Rachel, and to my two grand children, Sarah and Leah Post, the daughters of my son, Adrian Post, deceased, £150, And my son Peter is to pay to my daughter Antye, Klaartise, wife of Peter De Groot, Janettie, Helena, and Maritie, £150. I leave to my son Johanes, and to my daughters, and my two grand children all that lot of land and tenements situate in Achquechtinock, in Essex County, New Jersey, adjoining the land of Harman Gerrittse. I give to each of my daughters, to whom I have not given one, a milch cow. All the rest of my personal estate to my children and grand children. And whereas I have given to my son Johanes £25, that amount is to be deducted from his part. I make my wife Francyntie, and Aaron Van Name, and Daniel Corsen, executors.

Witnesses, Gerrit Clauson, Benjamin Keldy, Thomas Lisk. It is my will that my son Peter shall be instructed and learn some trade or occupation.

Codicil, March 25, 1756.--Whereas in my will I have ordered that my son Peter pay £150 as therein directed, he is discharged from the same.

Witnesses, John La Tourette, Peter Van Pelt, Christopher Gerbrants. Proved, August 13, 1756.