| Name | Joanna | |
| Birth | 1936 | |
| Gender | Female | |
| Death | 1939 | |
| Person ID | I2631 | Test |
| Last Modified | 13 Jun 2026 | |
| Father | Grand Duke George Donatus of_Hesse, b. 1906 d. 1937 (Age 31 years) | |
| Mother | Princess Cecilie of_Greece Mountbatten, b. 1911 d. 1937 (Age 26 years) | |
| Marriage | 1931 | |
| Family ID | F158 | Group Sheet | Family Chart |