 Janess is later promoted to Regimental Commandant, and adopts her father's last name.Lady Janet Roxbrough is the mother of Supreme Bashar Miles Teg who had taught him the Bene Gesserit ways in his youth, prior to "Heretics of Dune" (1984).Lady Jessica is the concubine of Duke Leto Atreides and mother of Paul Atreides in "Dune" (1965).