Siegfried was born about 1050, the son of Otto II von Northeim and Richenza de Souabe. The place is not known.
He died in 1107. The place is not known.
His wife was Adelheid von Holstein. They were married, but the date and place have not been found. They had no known children.
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Siegfried III von Boyneburg |
Otto II von Northeim |
Bernhard von Northeim |
Siegfried I von Northeim |
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Eilika von Stade |
Bernard I von Sachsen |
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Hildegarde von Stade |
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Richenza de Souabe |
Otton II von Hammerstein |
Ezzo von Lothringen |
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Mathilde von Sachsen |
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Bolesław I Chrobry |
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|
Emmilde de Lusace |
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1050 |
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| Death | 1107 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | FROM 1083 TO 1107 | graf von Boyneburg |