The House of Kell was a Sith organization during the War of Twelve Heirs, and one of the four Houses. It was headed up by the Sith Lords Kell, Saxa and Am Lee.
The strongest of the four Houses, the House of Kell was also the oldest, being formed two years prior to the death of Hekas-ni. By the time of the outbreak of war in 3,963 BBY, the House of Kell had the largest fleet of the four houses, as well as the largest source of minerals in the form of Saxa's regional worlds.