Blavatsky Helena Petrovna Hahn
Bla·vat·sky(blə-văt′skē, -vät′-), Helena Petrovna Hahn 1831-1891.
Russian-born theosophist who founded (1875) the Theosophical Society in New York City and wrote books of occult lore, such as Isis Unveiled (1877).
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