Caval (or Cabal) is the hound of King Arthur.
According to Nennius, when Arthur was pursuing the boar Troynt, Caval's footprint was left on a stone in Wales, which moved from its resting place at night, always returning in the morning, and that Arthur erected a cairn over it. Another story makes Caval take part in the hunt for the boar Ysgithyrwyn, one of the tasks of Culwich.
Caliburn is also the name of one of the domains in Kingdoms of Camelot.