Joan van Foreest was born 5 June 1766 in Hoorn, North Holland, Netherlands to Cornelis van Foreest (1704-1761) and Maria Eva van Akerlaken (1705–1736) and died 29 December 1766 Hoorn, North Holland, Netherlands of unspecified causes. He married Agatha van Foreest (1733-1801) in Hoorn, North Holland, Netherlands.
|Maria Eva van Foreest (1753-1820)|
|Nanning van Foreest (1757-1813)|
|Joan van Foreest (1762-1825)|
|Jacob van Foreest (1767-1826)|