┌─Edward the Elder King of England ⇒
│ └─Eadgifu
┌─Æthelred the Unready King of England
│ └─Ælfthryth
Edward the Confessor King of England
│ ┌─Rollo
│ ┌─William I Longsword of Normandy
│ │ └─Poppa
│ ┌─Richard I the Fearless of Normandy
│ │ └─Sprota
│ ┌─?
└─Gunnor