According to references and recordings he was the brother-in-law of Peter Stuyvescent, Governor.
He married Judith Varlet/Varleth in 1666, thus saving her from being murdered from the accusations of witchery. The couple had one son, Samuel.
1666 23 May Nicolaes Bayard, j.m. Van Alphen, en Judith Verlet, j.d. Van Amsterdam. 
1669 Sep 05 Samuel, de Hr. Nicolaes Baijard, Judith Verleths. Wit.: Nicolaes Verleth, Anna Stuyvensant. 
7 May 1707 Nicholas Bayard, merchant of New York, all estate to wife Judith and after her decease to son Samuel Bayard. Proved 19 April 1711. It then states: Judith Bayard having since deceased. Abstracts of NY Wills page 36.
↑ Samuel S. Purple. "Marriages from 1639 to 1801 in the Reformed Dutch Church, New York" In Collections of the New-York Genealogical and Biographical Society. Vol. I. New York: Printed for the Society, 1890.
↑ Thomas Grier Evans. "Baptisms from 1639 to 1730 in the Reformed Dutch Church, New York." In Collections of the New-York Genealogical and Biographical Society. Vol. II. New York: Printed for the Society, 1890.
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