Named for a character in Also sprach Zarathustra (1885) by the German philospher Friedrich Wilhelm Nietzsche (1844–1900). Suleika and Dudu {see planet  (564)} are mentioned in Part IV in the chapter Unter Töchtern der Wüste. These are the only feminine names in Zarathustra. (I. van Houten-Groeneveld) _ _.