Expanded Dune
This article or section refers to elements from Expanded Dune.
Interim Viceroy was the title taken by Serena Butler during the Butlerian Jihad. The term interim infers that Serena would only hold the title temporarily and it was in honor of her father; Manion Butler, that she never took the full title of Viceroy.
The full title was restored by Faykan Butler after the Great Purge.