Leucon Icheb was a Brunali man living in the 24th century. He was the husband of Yifay, and father of Icheb, who was named after his father's second name. (VOY: "Collective")

Leucon consented to having his unborn son genetically altered to produce anti-Borg pathogens. In 2375, when Icheb was still a child, Yifay and Leucon sent him to the Borg in order to infect them with the pathogen. In this manner, Leucon and his wife hoped to stem the tide of Borg invasions that were devastating their world.

Icheb returned to his parents a year later, having been rescued by the crew of the USS Voyager. However, as soon as Voyager left, Yifay and Leucon forcibly sedated Icheb in preparation for sending the boy to the Borg again.

Fortunately for Icheb, Voyager crewmember Seven of Nine had had her suspicions about Icheb's parents. She successfully collected evidence against them, and Voyager had come back to investigate. They interrupted Icheb's parents' plan and once again saved Icheb from the fate of being assimilated. Icheb remained permanently on Voyager until they reached the Alpha Quadrant. (VOY: "Collective", "Child's Play")

Leucon was played by Mark A. Sheppard.
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