Família: Johann Mathias Grassmann / Anna Christina Walmadin (F7781)
cas. 15 Fev 1774Johann Jakob Grassmann (1723-1780) 
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Anna Margarethe Manschell (Mangeau) (1724-1795)
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Johann Andreas (2) Grassmann (1754-1803)  |
| Heinrich Peter Grassmann (1747-1795) |
| Anna Martha Jakobina Grassmann (1761-1814) |
| Johann Andreas (1) Grassmann (1744-1753) |
| Heinrich Ludwig Grassmann (1757-1762) |
| Johann Jakob (Der Junger) Grassmann (1753-1753) |
| Johann Mathias Grassmann (1750-1807)
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| Anna Christina Walmadin (1735- ) |