d. 10,191. Duncan Idaho was the swordmaster for House Atreides and taught Paul Atreides in swordsmanship. He spent seven years on Ginaz and fought in the Battle of Ginaz when they were attack by Grumman. The Atreides saved Duncan from slavery and torture on Giedi Prime and ever since has been the most loyal man in the House guard. When the House moved to Arrakis, Duncan led one of the first waves to the desert planet. Once on Arrakis he made contact with the Fremen to help make allies of them for the Duke. He was excepted by the Fremen of Sietch Tabr. He was sent to stay with Stilgar in the Sietch in a duel alliance with the Fremen. When suspicion was brought against Jessica, Leto called him back to spy on her. The Fremen resented this. The night of the dinner party in Arrakeen, Duncan was ordered to escort one of the women home, while out he became drunk on Spice beer and made a scene in the Residency. He let the suspicion against Jessica out. He was contacted by Dr. Yeuh to rescue Paul and Jessica in the desert the night of the Harkonnen attack. He died defending Paul at one of the botanical testing stations.