Sara Bergwerf was born 1758 in Maassluis, South Holland, Netherlands to Pieter Bergwerf (1724-) and Trijntje Borsje (c1731-) and died 6 February 1820 Zierikzee, Zeeland, Netherlands of unspecified causes. She married Adriaan Mandel 22 June 1783 in Maassluis, South Holland, Netherlands. She married Cornelis Melhart (c1750-1820) 25 November 1808 in Zierikzee, South Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Antonia Mandel (c1787-1822) | 1787 Zierikzee, Zeeland, Netherlands | 6 October 1822 Zierikzee, Zeeland, Netherlands | Gilles Blok (c1788-1826) |
| Trijntje Mandel (c1791-1852) | |||
Residences