Web Reference: Explore Jean Hancock's biography, discography, and artist credits. Shop rare vinyl records, top albums, and more on Discogs. 6 days ago · His younger sister, Jean Hancock, born in 1943, was a brilliant individual often described by Herbie as a genius. She excelled academically from an early age, teaching herself advanced math before starting school and later becoming a computer consultant and analyst. Jean Hancock. Jean Hancock was born on 20 December 1943 in Chicago, Illinois, USA. She died on 2 August 1985 in Dallas, Texas, USA.
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