Leendert Knuijsen was born circa 1680 and died circa 17 November 1749 Spanbroek, North Holland, Netherlands of unspecified causes. He married Anna Maartens .
Children
| Name | Birth | Death | Joined with |
| Hendrik Knuijsen (1702-1775) | 28 July 1702 Spanbroek, North Holland, Netherlands | 24 October 1775 Spanbroek, North Holland, Netherlands | Marijtje Hermans (-1751) Neeltje Mouts (-aft1775) |
Footnotes (including sources)
| ‡ General |