Had one fair daughter, and none other child,

            And she was fairest of all flesh on earth,

            Guenevere, and in her his one delight."

                                            Tennyson.

Guinevere was the daughter of King Leodegrance and the wife of King Arthur.

One of the earliest romances, Chrétien de Troyes' -  Lancelot, the Knight of the Cart, is the first to tell, what is probably the best known story of Guinevere, the adultery of Guinevere and Lancelot, Arthur's friend and the queens champion. The affair which brings everything crashing down and she ends her days in religious seclusion.

Geoffrey of Monmouth's Historia mentions the isle of Avalon, where Arthur went to recover from wounds after his last battle, and it tells of Guinevere's infidelity with Lancelot and the rebellion instigated by Arthur's nephew Mordred.

Guinevere = Guenhuuara (Geoff of Mon.) = Guennuvar ( Gildas) = Gwenhwyfar ( welsh)

Guinevere is the  daughter  of King Leodegrance (Welsh Ogyr Van ), 

the wife of Arthur, 

the lover of Lancelot, 

the sister of Arianrhod.

related pages

Guinevere - Part 11 of the Idylls of the King by Alfred, Lord Tennyson

most of Le Morte d'Arthur by Sir Thomas Malory