Depending on whom you ask, this boys' name is either a nickname for Nicholas (no pun intended) or derived from the Old Norse name "Koli" (dark) or Gaelic "Coileain" (puppy).

some people's mothers can't spell: Collin Raye | Collin "Doc" Cunningham
There used to be an ascii picture of the pin eight software

mascot here, but it was removed at dannye's request.