Dirk van Foreest was born 25 September 1729 in Hoorn, North Holland, Netherlands to Cornelis van Foreest (1704-1761) and Maria Eva van Akerlaken (1705–1736) and died 27 March 1782 Alkmaar, North Holland, Netherlands of unspecified causes. He married Maria Wilhelmina Stoesak (1733-1782) 22 July 1755 in Alkmaar, North Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Cornelis van Foreest (1756-1825) | |||
| Zacheus van Foreest (1757-1824) | 23 November 1757 Alkmaar, North Holland, Netherlands | 21 October 1745 Alkmaar, North Holland, Netherlands | Rijka Maria van Cats (1762-1846) |
| Maria Eva van Foreest (1760-1818) | |||
| Louisa Jacoba van Foreest (1765-1824) | |||
| Deborah van Foreest (1768-1828) | |||