The name Caledon is a boy's name of Irish, Latin origin meaning "hard or rocky land". Caledon and discussed in our forums with posts like "Release the 20 T.I.G.E.R.S. -- the anti-elimination game! (BOYS)".
From the experts:
Caledon, the name of the arrogant Billy Zane character in "Titanic," is an Irish place-name related to Caledonia, the Latin word for Scotland thought to be derived from the ancient Celtic word for "hard." Cal is a wonderful nickname, and Caledon an inventive way to get there.