The na-Baron Feyd-Rautha Harkonnen is a fictional character in the 1965 science fiction novel Dune by Frank Herbert.The younger nephew of the cruel, powerful and cunning Baron Vladimir Harkonnen, the dark-haired, 16-year-old Feyd is as lean and muscular as the Baron is morbidly obese; the Baron also notes that the "full and pouting look" of Feyd's lips is "the Harkonnen genetic marker".