Jacob van Foreest was born 13 December 1731 in Hoorn, North Holland, Netherlands to Nanning van Foreest (1682-1745) and Jacoba de Vries (1706-1750) and died 6 November 1783 Alkmaar, North Holland, Netherlands of unspecified causes. He married Francina Jacoba Burman (1734-1792) 24 June 1755 .
Children
| Name | Birth | Death | Joined with |
| Nanning van Foreest (1756-1828) | |||
| Abraham van Fooreest (1760-) | |||
| Hercules van Fooreest (1762-) | |||