Theodore "Dash" Hardeen (born Ferenc Dezso Weisz (Hungarian name order: Weisz Ferenc Dezso), March 4, 1876 - June 12, 1945), known simply as Hardeen, was a Hungarian magician and escape artist who was the younger brother of Harry Houdini. Hardeen, who usually billed himself as the "brother of Houdini", was the founder of the Magician's Guild.

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