/Eustace I of Boulogne
        /Eustace II of Boulogne
       |    \Maud de Louvain
    /Eustace III of Boulogne
   |    \of Lorraine Ida
Matilda of Boulogne
   |        /Duncan I of Scotland
   |    /Malcolm III "Caennmor"
   |   |    \Ælflæd\Sybil of Northumberland
    \Princess Mary
       |    /Edward Atheling
        \St. Margaret Atheling
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