I like the idea of naming them after a theme but I can't decide on which one. For a while I had what you'd call a weather theme because I had Storm who was already named this when I adopted him and then even before I adopted an orange male I wanted to name him Sunny. I had Storm, Sunny, Cirrus, and Sky. Maybe you could go with a nature theme too. Alani & Blaze's litter were all named after deserts and Cirrus's litter were all named after rocks. He used to be called Flint. Good luck.