Naming an animal is so personal. Everyone has a different naming style. For instance, I always like regal sounding "people" names for animals. (For example, Webster and Gustav are two of my cats' names.)
That bunny looks like an Alastair to me.
But he could also be Augustus. Or Balthazar. Or Niles. Or Rupert. You get the idea.
You could always wait until the bunny "does" something cute, and base a name that way.
Or, you could think of a descriptive word about his appearance or personality, and name him that word in another language. For instance, Bruno means "brown one" in German.
Good luck, and congrats on your new addition!