Most commenly used as a last name of the Irish.
Usually fairly wealthy, and popular. Rayson's are most likely have a good life set up for them and are sucessful people.
"Hey dude, dont you wish you were a Rayson?"
"Yo that Rayson is so dope."
An American rock climber who received widespread attention in 2003 when he cut off his own lower arm after having it trapped beneath a boulder. Considered by many to set the bar for manliness.
Aron Ralston makes me look like a little Catholic schoolgirl by comparison. Or maybe it was my operation.