Board Thread:Questions and Answers/@comment-67.87.94.179-20121216031205/@comment-5772693-20140321172756

Well, Vivianne being a sorceress is more fanon than fact.

It would completely make sense if she was, I mean both of her daughters became High Priestesses, and she had a magical bracelet which was 'forged on the Isle of the Blessed by a High Priestess', but it was never confirmed.

We have no idea what happened to Vivianne, she was only mentioned like once.

Perhaps she had a sister who was a High Priestess and gave her the bracelet? Maybe she was squib in a family of wizards, or her mom was a powerful Sorceress and it skipped a generation and the Mor sisters inherited it from her.

If that's even how magic works in Merlin, they didn't go into detail about that either.

Anyway, Vivianne is a mystery, there are endless possibilities when it comes to her history.