Grietje or IJtje Sijmes Heuvel was born 29 September 1710 in Medemblik, North Holland, Netherlands to Sijmon Gerritsz (1663-1730) and Anna Pieters (c1690-aft1718) and died circa 27 April 1782 Bangert, North Holland, Netherlands of unspecified causes. She married Jacob Beers (1712-1763) 21 December 1735 in Wervershoof, North Holland, Netherlands.
Children
| Name | Birth | Death | Joined with |
| Sijmen Beers (1736-1736) | |||
| Etje Beers (1739-1739) | |||
| Etje Beers (1740-1741) | |||
| Etje Beers (1744-1744) | |||
| Sijmen Beers (1745-1746) | |||
| Sijmen Beers (1747-1747) | |||
| Jan Beers (1748-) | |||
| Simon Beers (1749-1828) | 21 July 1749 Onderdijk, North Holland, Netherlands | 26 August 1828 Wervershoof, North Holland, Netherlands | Maartje Stam (-1783) |
| Jantje Beers (1751-1817) | 2 July 1751 Onderdijk, North Holland, Netherlands | 2 March 1817 Andijk, North Holland, Netherlands | Dirk Meester (1746-1822) |
Footnotes (including sources)
| ‡ General |