Sigfried I. von Oldenburg900–
- Name
- Sigfried I. von Oldenburg
| Birth | 900 |
| Birth of a son #1 | Sigfried von Oldenburg about 917 (Age 17 years) |
| Birth of a son #2 | Otto von Oldenburg about 919 (Age 19 years) |
| Occupation | Graf (count) |
| Family with Ludmilla von Ringelheim |
| himself |
Sigfried I. von Oldenburg Birth: 900 — Altenburg, Altenburger Land, Thüringen, Germany |
| wife |
Ludmilla von Ringelheim Birth: 858 |
| son |
Sigfried von Oldenburg Birth: about 917 17 59 — Oldenburg |
|
3 years son |
Otto von Oldenburg Birth: estimated as close to sibling(s) — about 919 19 61 |