Welf was born about 1007, the son of Welf II von Altdorf and Ermentrude de Luxembourg. The place is not known.
He died on 13 NOV 1055 in Lac de Constance (Bodensee), Suisse/Deutschland/Österreich .
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Welf III |
Welf II von Altdorf |
Rudolf II von Altdorf |
Rudolf I von Altdorf |
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Konrad I von Öhningen |
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Ermentrude de Luxembourg |
Frédéric de Luxembourg |
Siegfried von Luxemburg |
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Hedwige von Nordgau |
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Irmentrude von Gleiberg |
Heribert I von Kinziggau |
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Irmentrude von Meingau |
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| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | ABT 1007 |
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| Death | 13 NOV 1055 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | duc de Carinthie (Herzogtum Kärnten) | |||||
| Nobility Title | margarve de Verone |