1882 - 1955 (73 år)
 | Donald Edward Wolff 1923-2020 |
| Donald Edward Wolff | |
| F: | 30 Nov 1923 |
| Cedar Falls, Black Hawk County, Iowa, USA | |
| D: | 17 Sep 2020 |
| Albert Thygesen Wolff 1882-1955 |
| Albert Thygesen Wolff | |
| F: | 5 Nov 1882 |
| Racine, Racine County, Wisconsin, USA | |
| D: | 27 Nov 1955 |
| Cedar Falls, Black Hawk County, Iowa, USA | |
 | Matilda Johanne Krogh 1881-1959 |
| Matilda Johanne Krogh | |
| F: | 29 Nov 1881 |
| Grundy County, Iowa, USA | |
| D: | 15 Sep 1959 |
| Cedar Falls, Black Hawk County, Iowa, USA | |
