Keren Hayesod
Fyvel was born in Cologne, Germany. His mother, Sterna (Schneerson), was from a Belarusian Jewish family, was a niece of essayist Ahad Ha'am, and had worked for Chaim Weizmann. His father, Berthold Feiwel, from a Moravian Jewish family, was an executive director of Keren Hayesod.