So, according to
@firecracker725 's very helpful link above, about the designer of the "Grumpy" fashion:
"This season Georgine played on the idea of a "modern day fairytale." She went back and re-read all of the classic fairytales from the Brothers Grimm (the folklore writers of Cinderella, Rapunzel, Snow White, Sleeping Beauty, etc.). What would Little Red Riding Hood wear today? A fur lined (probably from the big bad woof) red parka of course!"
And: "
One of my favorite looks was the play on Snow White with a cute quirky shirt with Grumpy written across it. I love the badass nerdy vibe to the whole collection. "
I'm going to take a stab in the dark and say "Grumpy" is indeed meant to be Grumpy! After all, there wasn't a "Grumpy" in any of the original Bros Grimm stories - he's purely a Disney creation.
As for the others, you may be right. Or not. I'd have to read the write ups on the rest of them, and I'm not really inclined to track them all down.