One of the Houses of the Landsdraad. Related to the Corrino line. At one time ruled the Caladan with the position of siridar-Duke. Later ruled Arrakis as siridar-Duka until House Atreides rose to the imperial throne through their second most famous son, Paul Muad'dib. Other members of the family include Duke Leto Atreides, God Emperor Leto, Ghanima, Miles Teg, and Darwi Odrade. Lady Jessica and Chani are related by marriage.