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You may be looking for Yedrin Koss.

Koss was a highly skilled Vulcan architect, who, as a child, was arranged to be married to T'Pol. His father was an influential member of the Vulcan High Command.

In 2151, T'Pol postponed her wedding with Koss, a man whom she had only met four times before, to remain aboard Enterprise NX-01. (ENT: "Breaking the Ice")

In 2154, after her return to Vulcan after the Xindi incident, T'Pol's mother T'Les urged her to marry Koss, but she still refused. Koss visited T'Pol and attempted to persuade her to marry him by offering to let her resume her career if she spent one year with him on Vulcan. He also offered to help her mother regain her position at the academy from which she had been dismissed because of T'Pol's involvement in the incident at P'Jem. Under the condition of remaining on Enterprise for the time being, T'Pol finally agreed and the two were subsequently married at T'Les' house. (ENT: "Home")

Later that year, Koss brought T'Pol an IDIC necklace from her mother which contained a hidden map of Vulcan's Forge. Needing to reach the Vulcan High Command, Archer contacted Koss who gave Archer and T'Pau his transporter codes, enabling them to reach the High Command and present Kir'Shara, something Koss did for T'Pol's sake. He ended his marriage with T'Pol after the death of T'Les. Shortly thereafter, their marriage was officially dissolved. (ENT: "The Forge", "Kir'Shara", "Babel One")

Koss was played by Michael Reilly Burke.
In the script for "Home", Koss was initially described as "a striking Vulcan man approximately T'Pol's age." This would put his year of birth around 2088. After providing his name, the script went on to say, "Although tall and severe in appearance, we sense a total lack of pretension in this Vulcan."
Koss was present in an extended scene from "Home" (included in the ENT Season 4 Blu-ray). In the deleted portion of the scene, it was established that, prior to meeting Charles Tucker III, he had never before met a Human.

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