Helena Rozhenko

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Helena Rozhenko was a Human woman in the 24th century, the wife of Sergey Rozhenko, mother of Nikolai Rozhenko, and adoptive mother of orphaned Klingon Worf. (TNG episodes: "Family", "New Ground")

Helena and Sergey were already thinking of having a second child when Sergey found Worf in the rubble of his home on Khitomer. Helena agreed to take Worf in once Sergey explained that Worf had nowhere to go to and that he might be in danger within the Klingon Empire. (TLE novel: The Art of the Impossible)