Monique Marie Mauricette Wilson (née Arnoux) also known as Lady Olwen was a prominent Witch and member of Wicca founder Gerald Gardner's inner circle.

Wilson was born Monique Marie Mauricette Arnoux in Haiphong, Vietnam in 1923 (or possibly 1928) to French parents.

[4] Shortly before his death in 1964, Gerald Gardner named Monique Wilson his heir, bestowing most of his estate and the entire contents of his Museum of Witchcraft and Magic upon her.

[10] In 1973, Wilson sold the Museum and its contents (10,000 items) to Ripley's Believe It or Not!, facing much criticism from the Wiccan community for her perceived betrayal.

Their daughter, Yvette, renounced her association with Witchcraft and the Wicca beliefs and actively avoids discussing her mother's life.