What is "feyd-rautha"

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". Feyd and his elder brother Glossu Rabban are the legal sons of Baron Harkonnen's youngest demibrother, Abulurd Rabban, who had "renounced the Harkonnen name and all rights to the title when given the subdistrict governorship of Rabban-Lankiveil".

Feyd is portrayed by Sting in the 1984 film Dune, and by Matt Keeslar in the 2000 miniseries Frank Herbert's Dune.