Ishkal



Ishkal is the fourth planet orbiting Sigma Draconis. It is believed that the word Shai-Hulud was first taken by the Zensunni Wanderers off this planet.

It was also the homeplanet of hulud.

Other Sources
In Dune 2000 Draconis IV is home to house Ordos.

Link
Ishkal in Star and Planets in Frank Herbert's Dune: A Gazeteer.