Welf IV. d'EsteAge: 71 years1030–1101
- Name
- Welf IV. d'Este
| Birth | between 1030 and 1040 34 20 |
| Birth of a half-brother | Hughes V. du Maine about 1037 |
| Death of a mother | Kunigunde von Altdorf about 1055 (Age 25 years) |
| Occupation | duc (duke) 1070 (Age 40 years) |
| Death of a father | Albert-Azzo II. d'Este 1097 (Age 67 years) |
| Death | November 9, 1101 (Age 71 years) |
| Family with parents |
| father |
Albert-Azzo II. d'Este Birth: about 996 Death: 1097 |
| mother |
Kunigunde von Altdorf Birth: estimated a gap of 25 years — about 1010 Death: about 1055 |
| himself |
Welf IV. d'Este Birth: between 1030 and 1040 34 20 Death: November 9, 1101 |
| Father’s family with Gersende du Maine |
| father |
Albert-Azzo II. d'Este Birth: about 996 Death: 1097 |
| step-mother |
Gersende du Maine Birth: ancestry not certain, estimated as equal to husband's birth year — about 1019 29 |
| half-brother |
Hughes V. du Maine Birth: estimated as close to sibling(s) — about 1037 41 18 Death: 1131 |