Did you choose a name yet?
You already have good ideas. Themes are fun too...
You could consider plant names like Basil, Pepper, Pumpkin, Rose, Daisy, Ivy.
Food names like Latte, Mocha, Snickers, Peanut, Burrito, Coffee, Popcorn, Cinnamon, Honey.
Or "sky" names like Orion, Pluto, Neptune, Draco, Galaxy, Nebula, Venus, Galaxy.
Or rock names like Quartz, Malachite, Copper, Clay, Diamond, Silver, Marble, Slate, Coal.
Or weather names like Blizzard, Volcano, Storm, Dusty, Sunny, Cloud, Rain, Frost
Or based on color (depending on color of course) like Ginger, Cinnamon, Onyx, Vanilla, Cream, Snow, Midnight, Shadow, Cocoa, Butter, Spot, Speckles.
Be sure that piggie and bunny don't have contact. Each species can carry disease that is harmful (or fatal) to the other.
Not sure if you've had rabbits before, but here is a good website about rabbits -- from housing to bunny proofing to health:
https://rabbitsindoors.weebly.com
(Refreshing doesn't hurt either