Things should be named after things you'll remember. Important things, and always things you know. I'm Spottedleaf because of my coat, and because I provide healing through herbs and plants, among other things. There's one that may be named Firepelt, for example, when he gets his full name - he's the brightest orange I've ever seen. Our leader is Bluestar; she's a lovely blue-grey color, and she's led ThunderClan for a very long time now. Halftail, Oakfur. Darkfoot. Tigerclaw.

Important things that you'll remember, and always things you know.

So I think Greentruth is a good name for a place to reside.