Premise: Guinevere . She first appears as Guanhumara ( with many spelling variants in the manuscript tradition ) in Geoffrey of Monmouth 's pseudo-historical chronicle of British history , the Historia Regum Britanniae , written circa 1136 AD . She is also found in medieval Welsh prose , in the mid-late 12th-century tale Culhwch and Olwen , as Arthur 's wife Gwenhwyfar . Sir Lancelot du Lac ( meaning Lancelot of the lake , baptised as Galahad ) was one of the Knights of the Round Table in the Arthurian legend .
Hypothesis: Guinevere was a King.
Label: CONTRADICTION