Kor, son of Kaltar was a Klingon warrior that led the House of Mur'Eq, father of Rynar, and grandfather to Rynar's son Kor. At some point after the Qu'Vat virus was created Kor and the rest of his house were infected. The disease caused them to become QuchHa', after which Kor changed his house's name from the House of Kor to the House of Mur'Eq in order to remind people that his family was descended from Emperor Mur'Eq. (ST novella: The Unhappy Ones)