Oddly, one of the LE people at the latest press conference said that in addition to the suspect "Colt Gray," there is another student at the school by the name of "Colton Gray," who wasn't involved in the shooting. I assume they confirmed that, but it seems strange to me. But I guess it could be a very common name...I'd guess it may be short for "Colton" which is an incredibly common name in the US. It's possible, but I don't think it would be unusual enough to be a huge problem, though of course bullies always find a way.
JMO