Mogh was a male Klingon who lived during the first half of the 24th century. He was the son of Worf. Upon Worf's death in 2333, he became leader of the House of Mogh. Married to Kaasin, he had two sons, Worf, who was named after Mogh's father, and Kurn. According to Kahlest in 2366, Mogh had been devoted to the Emperor of the Klingon Empire.
By 2346, Mogh had become suspicious that a high ranking Klingon was working with the Romulans. He followed the lead to Khitomer. When his rival Ja'rod betrayed the outpost to the Romulans, Mogh, his wife, and over 4,000 other Klingons died in the attack. (TLE novel: The Art of the Impossible; TNG episode: "Sins of the Father")