Don't know for sure, but am thinking it comes from the Latin root, "caspa" which means "residue". So, the ghost is the residue of a person who has died - the thing left over.
Casper Reardon's birth name is Casper A. Reardon.
Drew Casper's birth name is Joseph Andrew Casper.
Casper Jarnebrink's birth name is Casper Dennis Janebrink.
casper i think
Casper Martinez's birth name is Edil Martinez.
Casper
Casper
Casper Van Dien's birth name is Casper Robert Van Dien Jr..
Casper
It does not have a name in the movie.In the cartoon series "The Real Ghostbusters" it is given the name "Slimer"
yeah just type in myspace.com go to myspace and his name is bboy casper
the friendly ghost