Wilhelm Utermann
Wilhelm "Utz" Utermann was a German writer, journalist, screenwriter and film producer.
He used the following pseudonyms: William Utermann, William Roggersdorf and Mathias Racker.
Utermann was a former editor of the Nazi Party's newspaper Völkischer Beobachter and had been a Nazi bestselling author.
As Wilhelm Roggersdorf, he edited Erich von Däniken's Chariots of the Gods? and extensively rewrote the book.
He was married to Clementine zu Castell-Rüdenhausen.