Quick answer
Guinevere is a girl name with Norman French form of the Welsh roots meaning "white phantom".
Pronunciation: American English /ˈɡwɪn.ə.ˌvɪɹ/; British English /ˈɡwɪn.ə.ˌvɪə/.
Meaning and history
This name comes from the Norman French form of the Welsh name Gwenhwyfar meaning "white phantom", ultimately from the old Celtic roots * windos meaning "white" (modern Welsh gwen ) and * sēbros meaning "phantom, magical being". In Arthurian legend she was the beautiful wife of King Arthur. According to the 12th-century chronicler Geoffrey of Monmouth, she was seduced by Mordred before the battle of Camlann, which led to the deaths of both Mordred and Arthur. According to the 12th-century French poet Chrétien de Troyes, she engaged in an adulterous affair with Sir Lancelot. The Cornish form of this name, Jennifer, has become popular in the English-speaking world.
Notes and context
Usage: arthurian cycle