Johann Grassmann1815–
- Name
- Johann Grassmann
- Given names
- Johann
- Surname
- Grassmann
| Birth | about 1815 |
| Birth of a brother | Georg Grassmann about 1817 (Age 2 years) |
| Birth of a brother | Jacob Grassmann about 1818 (Age 3 years) |
| Marriage | Marianna Marx — View this family January 30, 1848 (Age 33 years) |
| Death | yes |