Daughter of Theunis Thomaszen and Belitje Jacobs.
"Records of the Reformed Dutch Church in New York", New York Genealogical and Biographical Record Vols.5- (1874-): 5:29.

Hillegond Theunise was baptized on 25 November 1640 at Reformed Dutch Church, New Amsterdam, sponsors Hendricks Janszen, Smidt; olof Stephensz. van courlt; Pietertie Jans.
Ibid., 5:29. Hillegond; parents: Theunis Thomas, Belitje Jacobs; witnesses: Hendricks Janszen, Smidt, olof Stephensz, van Courlt, Pietertie Jans.

She married with banns published on 29 March 1658 at Reformed Dutch Church, New Amsterdam, Jacob Toenissen de Kay.
Samuel S. Purple, Records of the Reformed Dutch Church in New Amsterdam and New York; Marriages from 11 December 1639 to 26 August 1801 (Bowie, MD: Heritage Books, reprint 2003, original 1890 NYG&BS), page 22. Jacob Toeniszen Van Tuyl in Gelderlt, en Hilletje Toenis, Van N. Amsterdam.

Witnessed the baptism of Annetie Herckse , daughter of Herck Siboutszen and Wyntje Theunise, on 19 April 1662 at Reformed Dutch Church, New Amsterdam, (sponsor Hillegond Theunis).
"Records of the Reformed Dutch Church in New York", New York Genealogical and Biographical Record Vols.5- (1874-): 6:96. Annetie; parents: Herck Siboutszen, Wyntie Theunis.

Witnessed the baptism of Marritie Leursen , daughter of Carsten Leursen and Geertje Theunise, on 25 May 1670 at Reformed Dutch Church, New York City, New York, (sponsors Jacob de Kay, Hillegond Theunis).
Thomas Grier Evans, editor, Baptisms from 1639 to 1730 in the Reformed Dutch Church, New York, Collections of the New York Genealogical and Biographical Society, Vol. 2 (New York: Printed for the Society, 1901), page 98. Marritie; parents: Charsten Luurszen, Geertie Theunis.

Witnessed the baptism of Aeltie Leursen , daughter of Carsten Leursen and Geertje Theunise, on 9 December 1678 at Reformed Dutch Church, New York City, New York, (witnesses: Jacob Theuniszen de Key, Hillegond Theunis, Geesje Barents).
Ibid., page 135. Aeltie; parents: Kartsen Luurszen, Geertie Theunis; witnesses: Jacob Theuniszen de Key, Hillegond Theunis, Geesje Barents.

Witnessed the baptism of Johannes Leursen , son of Carsten Leursen and Geertje Theunise, on 19 April 1681 at Reformed Dutch Church, New York City, New York, (witnesses: Jacob Theuniszen de Key, Hillegond Theunis).
Ibid., page 146. Johannes; parents: Carsten Luurszen, Geertie Theunis; witnesses: Jacob Theuniszen de Key, Hillegond Theunis.

Witnessed the baptism of Hillegond De Kay , daughter of Theunis de Kay and Helena Van Brugh, on 1 November 1682 at Reformed Dutch Church, New York City, New York, (witnesses: Johannes Van Brug, Hillegond Theunis).
Ibid., page 155. Hillegond; parents: Theunis de Key, Helena Van Brug; witnesses: Johannes Van Brug, Hillegond Theunis.

Children by Jacob Toenissen de Kay b. between 1620 and 1630:
1. Theunis de Kay b. 4 Apr 1659, d. betwen 20 Aug 1702 and 11 Mar 1708
William Brower Bogardus, Dear "Cousin": A Charted Genealogy of the Descendants of Anneke Jans Bogardus (1605-1663) to the 5th Generation - and of her sister, Marritje Jans (Wilmington, OH, U.S.A.: Anneke Jans and Everardus Bogardus Descendants Association, 1996), p.146.
2. Janneken Jacobse de Kay b. 15 Dec 1660, d. before Nov 1665
"Records of the Reformed Dutch Church in New York", New York Genealogical and Biographical Record Vols.5- (1874-): 6:91. Janneken; parents: Jacob Theuniszen, Hilligond Theunis.
3. Johannes Jacobsz de Kay b. 28 Jan 1662, d. before Jun 1664
Ibid., 6:96. Johannes; parents Jacob Theuniszen, Key, Hillegond Theunis.
4. Johannes de Kay b. 8 Jun 1664, d. before Jul 1668
Ibid., 7:19. Johannes; parents: Jacobus de Key, Hillegond Theunis.
5. Janneken de Kay b. 28 Nov 1665
Ibid., 7:69. Janneken; parents: Jacobus de Key, Hillegond Theunis.
6. Johannes de Kay b. 18 Jul 1668, d. before 1 Apr 1679
Ibid., 7:127. Johannes; parents: Jacobus de Key, Hillegond Theunis.
7. Agnes de Kay b. 6 Jul 1670
Thomas Grier Evans, editor, Baptisms from 1639 to 1730 in the Reformed Dutch Church, New York, Collections of the New York Genealogical and Biographical Society, Vol. 2 (New York: Printed for the Society, 1901), page 99. Agnietie; parents: Jacob de Key, Hillegond Theunis
Arthur Craig Quick, A Genealogy of the Quick Family in America (South Haven, Michigan: A.C. Quick, 1942), p.14.
8. Jacobus de Kay b. 27 Nov 1672, d. after 3 Jan 1725
Thomas Grier Evans, editor, Baptisms from 1639 to 1730 in the Reformed Dutch Church, New York, Collections of the New York Genealogical and Biographical Society, Vol. 2 (New York: Printed for the Society, 1901), page 107. Jacobus; parents: Jacob Theuniszen de Key, Hillegond Theunis.
9. Maria Jacobse de Kay b. 27 Jan 1675
Ibid., page 117. Maria; parents: Jacob Theunisz. de Key, Hillegond Theunis; witnesses: Karsten Leursen, Marritie Jans.
10. Samuel Jacobsz de Kay b. 4 Apr 1677
Ibid., page 127. Samuel; parents: Jacob Theunisz. de Key, Hillegond Theunis; witnesses: Mr. Gerrit Van Tricht, Geertie Theunis.
11. Johannes de Kay
Ibid., page 137. Johannes; parents: Jacob Theunisz. de Key, Hillegond Theunis; witnesses: Pieter Jacobszen Marius, Geesje Theunis.
12. Rachel Jacobse de Kay
Ibid., page 143. Rachel; parents: Jacobus de Key, Hillegond Theunis; witnesses: Karsten Luurszen, Catharina Roelofs
13. Samuel de Kay
Ibid., page 156. Samuel; parents: Jacobus de Key, Hillegond Theunis; witnesses: Pieter Jacobszen Marius, Gerritie Theunis, Marritie Beeck.

Hillegond Theunise died on 15 March 1707.
Arthur Craig Quick, A Genealogy of the Quick Family in America (South Haven, Michigan: A.C. Quick, 1942), p.12.

Bio includes data from The Brouwer Genealogy Database.
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