| Name | Sybille van Northumberland | |
| Gender | Female | |
| Person ID | I4923 | Martherus |
| Last Modified | 9 Jun 2004 | |
| Father | Siward van Huntingdon | |
| Mother | Aelflaed van Northumberland | |
| Family ID | F2558 | Group Sheet | Family Chart |
| Family | Duncan I van Schotland | |||
| Children |
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| Family ID | F2773 | Group Sheet | Family Chart | ||