Nope, he's gonna stay Ray. We like it as a kitty name, we have all sorts of puns already (he's not very sad, so he can't be a blue-ray, so we're not sure if he's high definition or not, for example). Ray, while I love it as a name for people too, isn't anything any of our relatives are called or that we would name a child, so it's a good kitty name here.
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