Lives of the Brothers Humboldt - Alexander amp William Translated from the original German at the turn of the century, this is an exhaustive biography of both brothers Humboldt, with a section of the book devoted to each. Friedrich Heinrich Alexander, Baron von Humboldt, (September 14, 1769, Berlin-May 6, 1859, Berlin), was a German naturalist and explorer, and the younger brother of the Prussian minister, philosopher, and linguist Wilhelm von Humboldt...