Patty Duke was born Anna Marie Duke on December 14, 1946 in Elmhurst, New York, to Frances Margaret (McMahon), a cashier, and John Patrick Duke, a cab driver and handyman. She is of Irish, and one eighth German, descent. Her acting career began when she was introduced to her brother Ray Duke's managers, John and Ethel Ross. Soon after, Anna Marie became Patty, the actress. Patty started off in commercials, a few movies and some bit parts. Her first big, memorable role came when she was chosen to portray the blind and deaf Helen Keller in the B…