How was Diana related to royalty, and is her family tree available online?
Diana has many lines of descent from royalty. She descends from some of the natural children of King Charles II and King James II, sons of Charles I, King of England. Some of these lines of descent are from her paternal grandfather, the 7th Earl Spencer while the other lines are from his wife, Lady Cynthia Hamilton. As well as being a descendant of Kings of England, Diana can claim descent from the Kings of Aragon, Cyprus, France, Jerusalem, Portugal, Scotland; the Holy Roman Emperors; the Dukes of Bavaria; the Dukes of Savoy; and a variety of other sovereigns. A PDF edition of the Spencer family tree is available from Althorp.com.