MaleSiward (Sigurd)-Earl of Northumbria of Northumbria |
| Birth | 1000 | Perth, Perthshire, Scotland, United Kingdom |
| Death | 26 Mar 1055 | York, Yorkshire, England, United Kingdom |
| Burial | York, Yorkshire, England, United Kingdom |
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| Marriage | 1055 | Northumbria, England |
| Father | Ulf Thorgilsson | F13588 Group Sheet | |
| Mother | Estrid Svendsdatter | F13588 Group Sheet | |
FemaleAelfled ( Elfleda) Of Bernicia, Countess of Northumberland |
| Birth | Abt 1040 | England, United Kingdom |
| Death | DECEASED | |
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