Hayt was the name given to the first Duncan Idaho ghola produced by the Bene Tleilax. In Arabic, Hayt (حياة) means "Life." Hayt was given as a gift to Paul Atreides, though, was secretly a tool intended to kill Paul. Paul knew this, and accepted it regardless. Though a ghola, Hayt was trained as a mentat, and exercised those abilities a number of times. During his time on Arrakis, he developed a love for Paul Atreides' little sister, Alia; who was having an inner conflict with the genetic remnant of Baron Vladimir Harkonnen.