One of my tasks this year is to update my local computer's genealogy database, beginning with the paternal side. I turned to my ChatGPT assistant to talk through my plan, including the pros and cons of wholesale downloads from FamilySearch. It suggested that I stick to updating my local tree by hand unless a FamilySearch tree was long and well documented (as many of my New England lines are), so I decided to harmonize my databases one measure—or rather, one generation—at a time.
That approach proved wise when a long Van Horne line began to crumble, revealing several generations with little or no documentation. When I moved on to the DuBois family, I paused to think more carefully. We have already met Jacob DuBois, son of Louis “the Walloon” DuBois and Catherine Blanchan, who was very likely one of Catherine’s children taken captive by Indians. Jacob had two wives: Elizabeth Gerritse Vernoye and, most likely after being widowed, Gerritje Gerretse Van Nieukerk. What do we actually know about these marriages and Jacob’s children?
At this distance in time, records are essential to piecing the story together. There is a marriage record for Jacob DuBois and Elizabeth Vernoy(e), dated March 8, 1689, which gives Elizabeth’s father’s name as Cornelis C. Vernoy. Jacob’s second marriage—presumably after Elizabeth’s death—is listed on FamilySearch as March 1690, but no marriage record is cited.
So where does the problem arise? My sixth-great-grandmother was Magdalena DuBois, Jacob’s daughter. According to FamilySearch, her mother was Gerritje Van Nieukerk; however, Magdalena’s christening record, dated May 25, 1690, lists her father but does not name her mother. Many records from this set omit the mother’s name, so I did not want to draw conclusions too quickly. Still, if we accept the FamilySearch timeline, this would mean a March marriage followed by a May birth. While short intervals between marriage and the birth of a first child are not unusual, this does raise red flags.
There is, however, another important clue. In the witnesses and sponsors column of Magdalena’s baptism record, the names listed are: “The Father. Annetje Vernoy. Louis DuBois.” This strongly suggests that Magdalena’s maternal family was the Vernoy family, not the Van Nieukerk family. Supporting this interpretation is a marker in the Huguenot Cemetery in New Paltz, New York, which lists Jacob DuBois (1661–1745), Lysbeth Vernooy (1662–1690), and Gerretje Gerritsen Van Nieuwkirk (1669–1739).
Gerritje herself had been widowed; her husband, Barent Janse Kunst, died on October 13, 1689, leaving her with a daughter, Jacomyntje. Magdalena would therefore have had an older stepsister, Jacomyntje Kunst, whose christening record from May 3, 1693 does include her mother’s name: Gerritje N. Newkirk.
So far, we have been working with names and dates, but these records allow us to assemble a plausible narrative. Jacob—who had survived Indian captivity and, along with his father Louis and other patentees, helped found New Paltz in 1677—married Elizabeth Vernoy in 1689 at age twenty-eight. Elizabeth was a year younger than he was. The following year, they welcomed a daughter, Magdalena, but Elizabeth died that same year, possibly as a result of childbirth. Jacob was likely supported by his family and perhaps by his late wife’s family as well, who were already closely connected through Jacob’s brother David, who had married Elizabeth’s sister, Cornelia. The closeness of these families is underscored by the fact that David and Cornelia’s daughter, Catryn, was baptized on the same day as Magdalena.
Between 1690 and 1692, Jacob married again, this time to the widow Gerritje Van Nieukerk Kunst. Magdalena grew up alongside her older stepsister and, over time, twelve half-siblings. Magdalena later married Peter Van Nest, and at some point the family moved from Kingston, New York, to Somerset County, New Jersey. There, their daughter Margaret married Francis Cossart, the well-known patriot who founded the Conewago Colony of Pennsylvania.
Two lessons emerge from this exercise. First, death was an ever-present reality in colonial America. Second, online trees—even reputable ones—must be confirmed with records before being blindly downloaded into a reference family tree. Next task: correcting the FamilySearch entries to bring the databases into harmony.

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