@Felthry
It is. He's originally from the Wallace and Gromit short "A Close Shave", where one of the first things that happens to him is falling into an automatic sheep-shearing-yarn-spinning machine Wallace invented. He's none the worse for wear, just temporarily wool-free, so they let him wear the sweater the machine knitted out of his own wool. And then Wallace decides to name him "Shawn" for that exact reason.