From Dune Wiki: Elrood Corrino IX [b. January 1, 9999-d. 10156 AG] was the 80th and penultimate Padishah Emperor of the Corrino Empire, as well as one of the last Emperors of the Known Universe. He succumbed to chaumurky and was succeeded by his son, Shaddam Corrino IV.
The frequently discredited Pirate History of Corrino related the curious story that Count Hasimir Fenring was responsible for his death.
He was first mentioned in the glossary of the 1965 novel.
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