Gerrit Oonk was born on September 3, 1693 in Kotten, Winterswijk, Netherlands to Berent Oonk and Berendeken Honders. He lived at Hesselink, Kotten 2. Gerrit married Jenneke Slotboom on February 15, 1722.
|Offspring of Gerrit Oonk and Jenneke Slotboom (1704-?)|
|Gesina Hesselink (1737-1825)||16 January 1737 Kotten, Winterswijk, Gelderland, Netherlands||8 February 1825 Winterswijk, Gelderland, Netherlands|| Harmen Annevelt (c1732-?)|