┌─Mathew of Boulogne
Matilda of Boulogne
│ ┌─Étienne-Henri of Blois
│ ┌─Stephen of Blois King of England
│ │ │ ┌─William I King of England ⇒
│ │ └─Adela of Blois
│ │ └─Matilda of Flanders ⇒
└─Marie I of Boulogne
│ ┌─Eustace II of Boulogne ⇒
│ ┌─Eustace III of Boulogne
│ │ └─Ida of Loraine ⇒
└─Matilda of Boulogne
│ ┌─Malcolm III King of Scotland ⇒
└─Mary of Scotland
└─Margaret of Wessex ⇒