┌─Siward of Northumbria
┌─Waltheof of Northumbria
│ │ ┌─Uhtred of Northumbria ⇒
│ │ ┌─Ealdred of Bernicia
│ └─Aelfflaed
Maud of Northumbria
│ ┌─Lambert II of Lens
└─Judith of Lens
│ ┌─Richard II the Good of Normandy ⇒
│ ┌─Robert I the Magnificent of Normandy
│ │ └─Judith de Rennes ⇒
└─Adelaide of Normandy
└─Herleve of Falaise