Gerrit Jans Decker and Grietje Jans Decker
Gerrit Jans Decker was baptized 14 February 1665 in Kingston, Ulster, New York. He was the son of Jan Gerritsen Decker and Grietjen Hendricks Westercamp. He had an older half-brother, Pieter, and three brothers, Hendrick, Jacob, and Hermanus. Gerrit married Grietje Jans Decker in 1685 in Kingston, Ulster, New York.  Grietje was baptized 31 August 1664 in Kingston, Ulster, New York, the daughter of Jan Broersen Decker and Heyltje Jacobs. She had four brothers, Jacob, Broer, Gaerleff (Gerrett), and Cornelis, and three sisters, Maddelen, Fietie and Titjen. In 1689, Gerrit, who was living in Ulster County, took an oath of allegiance.
Gerrit and Grietje had:
1. Heyltie Gerritse Decker, born in Rochester, Ulster, New York, baptized 10 Jan 1686 in Kingston, Ulster, New York, Henderick Schoonmacker in 1704 in Kingston, Ulster, New York.
2. Jan Gerritsz Decker, born in the Esopus, baptized 28 Jul 1688 in Kingston, Ulster, New York, married 1) Barbara de Witt and 2) Margaret Kleyn 18 Oct 1747 in Smithfield, Fayette, Pennsylvania. 
3. Margrieta Decker, born in Rochester, Ulster, New York, baptized 1 Dec 1695 in Kingston, Ulster, New York, married Thomas Kwik 22 Dec 1713 in Kingston, Ulster, New York.
4. Ariaantje Decker, born in Rochester, Ulster, New York, baptized 15 May 1698 in Kingston, Ulster, New York, married Tjerck de Wit 8 Aug 1719 in Kingston, Ulster, New York.
1. Hoes, Roswell Randall (comp.), Baptismal and Marriage Registers of the Old Dutch Church of Kingston, Ulster County, New York, Baltimore, MD: Genealogical Publishing Co., Inc., 1997 (originally published by De Vinne Press (New York), 1891).
2. Records of the Reformed Dutch Church at Smithfield, Pennsylvania.
3. O'Callaghan, E.B., The Documentary History of the State of New York, Vol. I, Albany: Weed Parsons, & Co., 1850, p. 174.
Records of Baptisms of the Reformed Church at Kingston, Ulster, NY.
Page Number Baptism Number Baptism Date Parents Child Witnesses 4 43 1664 Jan Broersen Grietje Willem Jansen Schut. 31 Aug. Heyltjen Jacobs Grietjen Jans. 4 51 1665 Jan Gerretsen Gerret Hendrick Vosman. 14 Feb. Grietjen Hendricks Mariken Everingh. Grietjen Hendricks. 25 443 1686 Gerard Deckers Heyltie Hendric Deckers. 10 Jan. Margriet Deckers Magdaleen Deckers. 31 581 1688 Gerith Decker Jan Jan Gerithse Decker. 28 July Grithje Decker Jacob Janse Decker. 46 879 1695 Gerrit Decker Margarit Cornelis Janssen Decker. 1 Dec. Grietje Deckers Elsje ten Broeck. 53 1036 1698 Gerrit Decker Ariaantje Cornelis Swits. 15 May Margriet Decker Jan Decker. Jannetje Swits. Page 508, Marriage Number 75
Kingston Marriage Register.
(Date of marriage not given.)
GERARD JANZ DECKER, j. m., from the Esopus, resid. at Mombachus (Mombaccus), and MARGRIET JANZ DECKER, j. d., from the Esopus, resid. at Marmur (Marbletown). First publication of Banns, 20 Jan.
Page 522, Marriage Number 230
(Date of marriage not given.)
HENDERICK SCHOONMACKER, born in Kingstowne, and HEYLTJE GERRITSE DECKER, born in Rochester, both resid. there. First publication of Banns, 25 Nov.
Page 528, Marriage Number 308
THOMAS KWIK, j. m., born in Nieuw-Jork (New York), and MARGRIETA DEKKERS, j. d., born in Rosester (Rochester). Banns registered, 6 Dec.
Page 536, Marriage Number 410
TJERK DE WIT, j. m., and ARIAANTJEN DEKKER, j. d., both born and resid. in Raysester (Rochester). Banns registered, 19 July.
Source: Hoes, Roswell Randall (comp.), Baptismal and Marriage Registers of the Old Dutch Church of Kingston, Ulster County, New York, Baltimore, MD: Genealogical Publishing Co., Inc., 1997 (originally published by De Vinne Press (New York), 1891).
Oct. 18, 1747. 10. John Decker, widower of Barbara Dewitt, to Margriet Kleyn, widow of Benjamin Eekerli, both dwelling in Smithfield, and born in Esopus; married the 8th of November.
Register of those in this Congregation
who had the Banns Proclaimed and were Married
Source: Records of the Reformed Dutch Church at Smithfield, Pennsylvania.
A rool of the names and surnames of them that haue takin the Oath of Allegiance in the County of Ulstr, by ordr of his Excely: the Gouernor; the ffirst day of Septembr Anno Qe: Domini 1689-
... Gerritt Jansa Decker..."
Source: O'Callaghan, E.B., The Documentary History of the State of New York, Vol. I, Albany: Weed Parsons, & Co., 1850, p. 174.
 There were two Gerrit Jans Deckers marrying within a year of each other in Kingston, the first marrying Magdalena Willemz Schut and the second Margriet Janz Decker. Both grooms were marked with "j. m.", meaning neither had married before. Also, Gerrit and Magdalena had children at the same time as Gerrit and Grietje were having their children. Thus, the two grooms were two separate people rather than one man who married twice.
This leaves the question-who was the father of the Gerrit Jans Decker who married Grietje?
Jan and Magdalena had no children named Jan, Heyltje, or Willemptje baptized in the Kingston record (only Jacob, Willem, Grietje (believed to have been named after Magdalena's mother), and Neeltje). While the above suggests that this Gerret was Jan Broersen's son, it offers no further clues to prove it. However, a Willemtie - was the witness at their son Jacob's baptism.
The names and baptismal witnesses of Gerrit and Grietje's children can offer no clues as they would have named their children after both sides of the family and members of both Decker families would have been witnesses to the baptisms. (Gerret and Grietje did name their first three children Jan, Heyltie, and Grietje.)
In the family of Jan Gerritsen, there is a son named Gerret but no daughter named Margriet (or Grietje). In the family of Jan Broersen, there is a daughter named Grietje, as well as a son named Gaerleff (probably a misspelling or mistranscription of Gerrett). As Grietje would not have married her own brother, it can be safely assumed that her husband, Gerrit, was the son of Jan Gerritsen and she was the daughter of Jan Broersen, while her brother Gerrett/Gaerleff was the one who married Magdalena Schut. MB
 The Kingston baptismal record records that in 1716, Jan Gerritsz Dekker and Barbara de Wit had their son Gerrit baptized (#2404). The use of the patronym Gerritsz and the naming of the oldest son as Gerrit support the idea this Jan was the same as the Jan, son of Gerrit Jans Decker. MB
 There were three recorded children named Margriet/Grietje Decker born during this time period. Margrieta, the daughter of Gerrit and Grietje, was one who later married Thomas Quick-see the page on Thomas Quick and Margriet Decker for a discussion on the topic.
(c) 2002 by Michelle Boyd, All rights reserved.
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Last updated 25 Jan 2003.