┌─Henry I of Brabant
Henry II of Brabant
│ ┌─Mathew of Boulogne
└─Matilda of Boulogne
│ ┌─Étienne-Henri of Blois
│ ┌─Stephen of Blois King of England
│ │ └─Adela of Blois ⇒
└─Marie I of Boulogne
│ ┌─Eustace III of Boulogne ⇒
└─Mary of Scotland ⇒