House of Antaak
The House of Antaak was a Klingon Great House. The members of this house were traditionally in the warrior caste. One notable exception to this was the Klingon doctor Antaak, who was disowned by his father for wanting to practice medicine. (ENT: "Divergence")
House of D'Ghor
The House of D'Ghor is a Great House in the Klingon Empire. Its enemy for several generations was the House of Kozak. The Great House suffered a major humiliation in 2371, when the dishonorable actions of the House's head, D'Ghor, led to his discommendation. (DS9: "The House of Quark")
House of Duras
The House of Duras was one of the Great Houses in the Klingon Empire which by 2366 had become highly influential in Klingon politics, so much so that its leader Duras (son of Ja'rod) was considered in 2367 for the position of Chancellor of the Klingon High Council.
House of Grilka ("House of Quark")
The House of Grilka was the new name given to the House of Kozak in 2371, after Kozak was killed in an accident on Deep Space 9. Gowron and the Klingon High Council granted Grilka special dispensation to lead the House, as Kozak had died in an accident. Until Gowron granted special dispensation, it was briefly known as the House of Quark. (DS9: "The House of Quark")
The House of Grilka was involved in the Federation-Klingon War and the Klingon-Cardassian War. These conflicts were costly to the House, as they lost starships, lands and warriors. (DS9: "Looking for par'Mach in All the Wrong Places")
House of Konjah
The House of Konjah is a Klingon Great House. On a mission to expose a Founder at the highest levels of the Klingon Empire in 2373, Miles O'Brien's alias, Pahash, was a member of the House of Konjah. (DS9: "Apocalypse Rising")
House of Kor
The House of Kor was a family of high social and political rank and one of the Great Houses in the Klingon Empire.
The House of Kor, led by Kor, son of Rynar, was descended of the Klingon Imperial family. Kor was the last son of the House of Kor, and his death in 2375 marked the end of the House. (DS9: "Once More Unto the Breach")
Let us never forget, Kor the Dahar Marster.
House of Kozak
The House of Kozak was a house of medium influence in the Klingon Empire, led by Kozak. The House of Kozak had been sworn enemies of the House of D'Ghor for seven generations. Rather than challenging Kozak's forces to battle, D'Ghor chose the dishonorable course of systematically undermining the House of Kozak's financial assets and territorial holdings, in a bid to seize Kozak's house.
Now the House of Grilka
House of Martok
The House of Martok is one of the Klingon Empire's most powerful and respected Great Houses, led by Martok and his wife Sirella. Martok himself had not been high-born, as he came from the Ketha Lowlands on Qo'noS, although his house gained significant influence and power thanks to his brilliant military career. In 2373, Martok formally invited Worf to join the House of Martok, after Worf played a critical role in the success of his first mission commanding the IKS Rotarran. (DS9: "Soldiers of the Empire")
House of Mo'Kai
The House of Mo'Kai was a Great House in the Klingon Empire.
In a holoprogram created by the Hirogen in 2374, the Klingon character of Kathryn Janeway was from the House of Mo'Kai and claimed the House would never yield while fighting the Alpha Hirogen. (VOY: "The Killing Game")
It is unknown if the House of Mo'Kai existed in reality.
House of Mogh
The House of Mogh was a family of high social and political rank and one of the Great Houses in the Klingon Empire until 2366 when false documents were produced which showed that Mogh had betrayed the Empire to the Romulans in the Khitomer Massacre of 2346. (TNG: "Sins of the Father")
House of Noggra
The House of Noggra was one of the Klingon Great Houses in the 2370s. It was one of the smaller houses in the Klingon Empire.
Noggra, the patriarch of the House, agreed to take Kurn into his house as a son after his memory engrams were altered to make him believe he was a different person named Rodek. (DS9: "Sons of Mogh")
Taken from
http://memory-alpha.org/wiki/Great_House