Alex Sanders
He claimed to have been initiated by his own grandmother in 1933. The actual documentary trail for his rituals, however, runs back only to a copied version of an existing rival tradition's ritual text, with additional Qabalistic material layered on top — not to any family lineage predating that borrowed source.
June Johns's 1969 biography of Alex Sanders; Stewart and Janet Farrar, What Witches Do (1971)
British occultist declared 'King of the Witches' by the press in the 1960s, founder of a major branch of modern Wicca bearing his name.