Basically you see the name Crockie while it's simple and appealing, I think if he wants to be unique, he should have a proper full name.
I've already set Emerald as his middle name as his body is of a bright shade of green.
The one I liked the best will be chosen as crockie's full name.

The only rule is that Crockie is based of potential first name and the initial of Emerald.
So it's best you base the first name on Croc or adjacent to that. *don't pick croc or crocodile*