Klaas Jonker was born March 1739 in Lutjebroek, North Holland, Netherlands to Jan Jonker (1710-) and Trijntje Uil (1714-) and died 20 October 1794 Lutjebroek, North Holland, Netherlands of unspecified causes. He married Antje Broersen (1743-1815) 1 January 1770 in Grootebroek, North Holland, Netherlands.
Klaas married his second cousin Antje: Pieter Kreuk is the great-grandfather of both.
Children
| Name | Birth | Death | Joined with |
| Trijntje Jonker (1770-?) | |||
| Jannetje Jonker (1772-?) | |||
| Teetje Jonker (1773-1775) | |||
| Teetje Jonker (1775-?) | |||
| Marijtje Jonker (1777-?) | |||
| Simon Jonker (1781-1846) | 1781 Lutjebroek, North Holland, Netherlands | 20 July 1846 Grootebroek, North Holland, Netherlands | Marijtje Schaper (1784-) |
| Geertje Jonker (1786-1819) | |||
Sources
Footnotes (including sources)
| ¶ Death |