Wanna Marcus (10092 AG-?10186 AG) was a Bene Gesserit adept, wife of the Suk School doctor Yueh, who betrayed Duke Leto Atreides. Wanna Marcus was believed to have been killed by order of Baron Harkonnen. Information concerning a plot to kill Duke Leto Atreides substantiates the extent of Wanna's involvement in Bene Gesserit political infiltration plans.