Weyoun is a fictional character from the television series Star Trek: Deep Space Nine, in which he is portrayed by Jeffrey Combs. In the series, Weyoun is a diplomat and advisor of the Vorta species who is a member of the ruthless and militaristic Gamma quadrant state the Dominion. Like all Vorta, Weyoun is officious and sycophantic, always deferring to the Founders yet being ruthless in dealing with enemies and those under his command.
Combs, who also played the recurring character of Brunt on Deep Space Nine, stated that he preferred playing Weyoun.
Weyoun 6 tried to defect to the Federation but sacrificed his own life in order to prevent Odo's death. Weyoun 7 was activated after the discovery of Weyoun 6's attempt to defect. Under normal circumstances, there is only one clone (of any given Vorta operative) operating at a time, but when Weyoun 6 defected, Weyoun 7 was immediately activated. Weyoun 7 was killed by Lieutenant Commander Worf ("Strange Bedfellows"). Worf is later mocked for this, as he had killed a mere clone instead of an enemy that was less replaceable.
Elim Garak killed Weyoun 8 during the Cardassian underground's assault on Dominion headquarters during the Battle of Cardassia ("What You Leave Behind, Part II"). Upon his death, the Female Changeling observes that Weyoun 8 was the last Weyoun clone, a fact that Garak, who loathed Weyoun, finds most gratifying, remarking: "I was hoping you'd say that!" This would be the last of the Weyoun clones, as a result of the destruction of the cloning facility on Rondac III ("The Changing Face of Evil").
A ninth Weyoun appeared in the non-canon novels of the Deep Space Nine relaunch, thus implying that the Female Changeling was referring only to Weyouns available in the Alpha Quadrant, while Weyoun's original genetic records were still available in the Gamma Quadrant.