House Clegane of Clegane's Keep is an vassal house that holds fealty to House Lannister of Casterly Rock. Their lands are southeast of Casterly Rock and consists of a small patch of land and a modest keep. They are landed knights rather than a full noble house, but hold strong ties to the Lannisters.
The head of the family is Ser Gregor Clegane, known as "The Mountain That Rides," who has since been named to the Kingsguard, under the name "Robert Strong". Gregor's younger brother, Sandor Clegane, known as "The Hound, is the rightful lord of House Clegane.
The Clegane sigil is three black dogs on a dark yellow background. The three dogs signify the three dogs that died fighting off the lioness that attacked Tytos Lannister.