Question: Who were the parents of the King with a mistress named Rosamund Clifford?

full_context: Document 1: The Fairy-Queen: The Fairy-Queen (1692; Purcell catalogue number Z.629) is a masque or semi-opera by Henry Purcell; a "Restoration spectacular". The libretto is an anonymous adaptation of William Shakespeare's wedding comedy "A Midsummer Night's Dream". First performed in 1692, "The Fairy-Queen" was composed three years before Purcell's death at the age of 35. Following his death, the score was lost and only rediscovered early in the twentieth century.
Document 2: Nell Gwynne (operetta): Nell Gwynne is a three-act comic opera composed by Robert Planquette, with a libretto by H. B. Farnie. The libretto is based on the play "Rochester" by William Thomas Moncrieff. The piece was a rare instance of an opera by a French composer being produced first in London. Farnie had written an earlier libretto on the same subject, with the same name, for composer Alfred Cellier, which was produced at the Prince's Theatre in Manchester in 1876.
Document 3: Joan of England, Queen of Sicily: Joan of England (October 1165 – 4 September 1199) was a queen consort of Sicily and countess consort of Toulouse. She was the seventh child of Henry II, King of England and his queen consort, Eleanor of Aquitaine.
Document 4: Roberto Devereux: Roberto Devereux (or "Roberto Devereux, ossia Il conte di Essex" ["Robert Devereux, or the Earl of Essex"]) is a "tragedia lirica", or tragic opera, by Gaetano Donizetti. Salvadore Cammarano wrote the Italian libretto after François Ancelot's tragedy "Elisabeth d'Angleterre" (1829), and based as well on the "Historie secrete des amours d'Elisabeth et du comte d'Essex" (1787) by "Jacques Lescéne des Maisons", although Devereux was the subject of at least two other French plays: "Le Comte d'Essex" by Thomas Corneille and "Le Comte d'Essex" by Gauthier de Costes, seigneur de la Calprenède.
Document 5: England and King David I: The relationship between the Kingdom of England and King David I, who was King of Scotland between 1124 and 1153, was partly shaped by David's relationship with the particular King of England, and partly by David's own ambition. David had a good relationship with and was an ally of Henry I of England, the King who was largely responsible for David's early career. After Henry's death, David upheld his support for his niece, the former Empress-consort, Matilda, and expanded his power in northern England in the process, despite his defeat at the Battle of the Standard in 1138.
Document 6: Henry II of France: Henry II (French: "Henri II" ; 31 March 1519 – 10 July 1559) was a monarch of the House of Valois who ruled as King of France from 31 March 1547 until his death in 1559. The second son of Francis I, he became Dauphin of France upon the death of his elder brother Francis III, Duke of Brittany, in 1536.
Document 7: Richard Coeur de Lion (play): Richard Coeur de Lion: An historical romance is a 1786 semi-opera with an English text by John Burgoyne set to music by Thomas Linley the Elder. It was first staged at Drury Lane Theatre in October 1786. It was a translation of Michel-Jean Sedaine's opera "Richard Coeur-de-lion" about the life of the English Monarch Richard I with the ending significantly changed. The work was a major success and ran for 43 performances and was revived seven times before the end of the century. By contrast a rival version staged at the Covent Garden Theatre at the same time was a failure.
Document 8: Fair Rosamond (opera): Fair Rosamond is an English historical opera in four acts composed by John Barnett, written in 1837 to a libretto by Charles Zachary Barnett, after the legend of Rosamund Clifford ("Fair Rosamond" or the "Rose of the World"), the 12th century mistress of King Henry II who was said to have been poisoned by the King's wife, Queen Eleanor. In his opera, Barnett effects a happier ending.
Document 9: Euryanthe: Euryanthe is a German "grand, heroic, romantic" opera by Carl Maria von Weber, first performed at the Theater am Kärntnertor, Vienna on 25 October 1823. Though acknowledged as one of Weber's most important operas, the work is rarely staged because of the weak libretto by Helmina von Chézy (who, incidentally, was also the author of the failed play "Rosamunde", for which Franz Schubert wrote music). "Euryanthe" is based on the 13th-century romance ""L'Histoire du très-noble et chevalereux prince Gérard, comte de Nevers et la très-virtueuse et très chaste princesse Euriant de Savoye, sa mye.""
Document 10: List of operas set in the Crusades: Operas set against the background of the medieval Crusades can be found in the earliest examples of the art form and continue to be written into the 21st century. Many of the works listed here contain characters and plots based on real or legendary figures of the time such as Tancred, Prince of Galilee, Godfrey of Bouillon or Jaufre Rudel. The majority are set, at least in part, in the Holy Land and the surrounding region and deal with the conflicts between the Christians and Muslims. Others, such as Donizetti's "Gabriella di Vergy", deal with the misadventures of knights returning from the Crusades. In the case of "Gabriella di Vergy", Raoul de Coucy returns from the Third Crusade to find that his beloved Gabriella has married Lord Fayel. Following a duel, Fayel cuts out the heart of the unfortunate Raoul and presents it in an urn to Gabriella. The only comedy in the list, Rossini's "Le comte Ory", recounts the attempts by Ory and his friends to seduce the Countess of Formoutiers and the women of her household while their men are away at the Crusades. Ory's ploy of dressing up as nuns to gain access to the women is foiled when the Crusaders return. Many of the libretti for the operas listed are based either directly or indirectly on Torquato Tasso's epic poem, "La Gerusalemme liberata" ("Jerusalem Delivered"), or on Voltaire's tragic play, "Zaïre".
Document 11: Henry II of England: Henry II (5 March 1133 – 6 July 1189), also known as Henry Curtmantle (French: "Court-manteau" ), Henry FitzEmpress or Henry Plantagenet, ruled as Count of Anjou, Count of Maine, Duke of Normandy, Duke of Aquitaine, Count of Nantes, King of England and Lord of Ireland; at various times, he also controlled Wales, Scotland and Brittany. Henry was the son of Geoffrey of Anjou and Matilda, daughter of Henry I of England. He became actively involved by the age of 14 in his mother's efforts to claim the throne of England, then occupied by Stephen of Blois, and was made Duke of Normandy at 17. He inherited Anjou in 1151 and shortly afterwards married Eleanor of Aquitaine, whose marriage to Louis VII of France had recently been annulled. Stephen agreed to a peace treaty after Henry's military expedition to England in 1153, and Henry inherited the kingdom on Stephen's death a year later.
Document 12: Rosamund Clifford: Rosamund Clifford (before 1150 – c. 1176), often called ""The Fair Rosamund"" or the ""Rose of the World"", was famed for her beauty and was a mistress of King Henry II of England, famous in English folklore.
Document 13: Dual monarchy of England and France: The dual monarchy of England and France existed during the latter phase of the Hundred Years' War when Charles VII of France and Henry VI of England disputed the succession to the throne of France. It commenced on 21 October 1422 upon the death of King Charles VI of France, who had signed the Treaty of Troyes which gave the French crown to his son-in-law Henry V of England and Henry's heirs. It excluded King Charles's son, the Dauphin Charles, who by right of primogeniture was the heir to the Kingdom of France. Although the Treaty was ratified by the Estates-General of France, the act was a contravention of the French law of succession which decreed that the French crown could not be alienated. Henry VI, son of Henry V, became king of both England and France and was recognized only by the English and Burgundians until 1435 as King Henry II of France. He was crowned King of France on 16 December 1431.
Document 14: England in the High Middle Ages: England in the High Middle Ages includes the history of England between the Norman Conquest in 1066 and the death of King John, considered by some to be the last of the Angevin kings of England, in 1216. A disputed succession and victory at the Battle of Hastings led to the conquest of England by William of Normandy in 1066. This linked the crown of England with possessions in France and brought a new aristocracy to the country that dominated landholding, government and the church. They brought with them the French language and maintained their rule through a system of castles and the introduction of a feudal system of landholding. By the time of William's death in 1087, England formed the largest part of an Anglo-Norman empire, ruled by nobles with landholdings across England, Normandy and Wales. William's sons disputed succession to his lands, with William II emerging as ruler of England and much of Normandy. On his death in 1100 his younger brother claimed the throne as Henry I and defeated his brother Robert to reunite England and Normandy. Henry was a ruthless yet effective king, but after the death of his only male heir in the White Ship tragedy, he persuaded his barons to recognise his daughter Matilda as heir. When Henry died in 1135 her cousin Stephen of Blois had himself proclaimed king, leading to a civil war known as The Anarchy. Eventually Stephen recognised Matilda's son Henry as his heir and when Stephen died in 1154, he succeeded as Henry II.
Document 15: Henry I of Castile: Henry I of Castile (14 April 1204 – 6 June 1217) was king of Castile. He was the son of Alfonso VIII of Castile and Eleanor of England, Queen of Castile (daughter of Henry II of England and Eleanor of Aquitaine).
ground_truth: Geoffrey of Anjou and Matilda