Calon is the son of Cayn, one of the House Stark guards at Winterfell.
Calon's father, Cayn, is killed by Sandor Clegane in King's Landing.
Calon plays lord of the crossing with the Frey wards, Big Walder and Little Walder. It is unknown what happened to Calon after the sack of Winterfell.
The women and children of Winterfell are said to have been taken by Ramsay Snow to the Dreadfort. It is unknown if Calon is with them or if he died in the sack of Winterfell.