Multiple line of descent from siblings within the same family -
Alfred 'The Great' through his children Ælfthryth and Edward 'the Elder', William 'The Conqueror' through his children Adela of Normandy and Henry I,
Henry II through his children Eleanor Queen of Castile and John 'Lackland',
John 'Lackland' through his children Richard Earl of Cornwall and Henry III,
Robert II King of France through his children Adela of France and Henry I King of France.
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