It's probably easiest to start with her name. She's says it's Nancy Katz. That's a surprise because most people know her as Nancy Spielberg.  Steven's sister. Or Steve as she and the rest of the family call him. While she has kept her maiden name for professional reasons, she answers to both surnames but at different times. Nancy Katz is a devoted wife and mother, the Modern Orthodox Jew who keeps the Sabbath and cooks kosher. Nancy Spielberg devotes her life to doing charitable works, primarily to causes that are related to children.