More than 80 years ago, Maria Svetasheva hid a Jewish child on her farm in southern Russia. The deed was risky: The Nazis who occupied her village at the base of the Caucasus Mountains were known to execute anyone caught aiding a Jew. The boy she took in and protected as one of her own in the early 1940s was Boris Tulman, who would survive World War II thanks to her efforts and eventually grow up to settle in Teaneck. His descendants still call North Jersey home. Tulman died two years ago at age 97. But his savior's heroism was...