This episode of the false Guenevere is very perplexing.
Finally, his relations with Guenevere are revealed to Arthur by the sons of King Lot, Gawain, however, taking no part in the disclosure.
To the majority of English readers Guenevere is best known in connexion with her liaison with Lancelot, a story which, in the hands of Malory and Tennyson, has assumed a form widely different from the original conception, and at once more picturesque and more convincing.
The Welsh triads know no fewer than three Gwenhwyfars; Giraldus Cambrensis, relating the discovery of the royal tombs at Glastonbury, speaks of the body found as that of Arthur's second wife; the prose Merlin gives Guenevere a bastard half-sister of the same name, who strongly resembles her; and the Lancelot relates how this lady, trading on the likeness, persuaded Arthur that she was the true daughter of Leodegrance, and the queen the bastard interloper.
But though Guenevere has changed her lover, the tradition of her infidelity is of much earlier date and formed a part of the primitive Arthurian legend.
Wace, who, while translating Geoffrey, evidently knew, and used, popular tradition, combines these two, asserting that she was of Roman parentage on the mother's side, but cousin to Cador of Cornwall by whom she was brought up. The tradition relating to Guenevere is decidedly confused and demands further study.