
| Name | Siward (de) Northumbria | |
| Prefix | {Earl} | |
| Birth | Abt 990 | Denmark |
| Gender | Male | |
| _FSFTID | G96W-FZC | |
| _UID | 233B6E4DFCFBB84096E8E26540BB44737F14 | |
| Death | 5 May 1055 | York, Yorkshire, England, United Kingdom |
| Burial | York, Yorkshire, England, United Kingdom |
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| Person ID | I29130 | Ken Tree |
| Last Modified | 3 Nov 2019 | |
| Father | Biorn Styrbiornson, b. 953 d. DECEASED | |
| Mother | Mrs- Biorn Styrbiornson, b. Abt 958, Scotland, United Kingdom d. DECEASED | |
| _UID | C1C6A51FED48724EB5E381BB0A1D76792A17 | |
| Family ID | F13606 | Group Sheet | Family Chart |
| Family | Elfleda (de) Northumbria, b. England, United Kingdom d. DECEASED | |||||
| _UID | 4385AE4E69F6CA4B8544B507B6E1DC275739 | |||||
| Children |
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| Family ID | F13550 | Group Sheet | Family Chart | ||||
| Last Modified | 1 Apr 2026 | |||||