1914 - 1987 (73 years)
1955-1989
| Prince Ludwig Rudolph HANOVER | |
| B: | 28 Nov 1955 |
| D: | 29 Nov 1989 |
1962-1989
| Countess Isabella Valsassina VON_THURN | |
| B: | 1962 |
| M: | Sep 1988 |
| D: | 29 Nov 1989 |
|
| Prince Ernest Augustus Of Hanover HANOVER | |
| B: | 1914 |
| D: | 1987 |
1925-1980
| Ortrud Of Schleswig- Holstein | |
| B: | 1925 |
| D: | 1980 |
