Have you considered [name]Tristan[/name]? I like him a lot, he is familiar to people and it is a name with a lot of charm.
Hmmm, what about [name]Heath[/name]? Fits in well with the nature-y [name]Pearl[/name] and [name]Lilac[/name]. Otherwise, you might like [name]Jude[/name], [name]Finn[/name], [name]Sol[/name], [name]River[/name], [name]Calum[/name] or [name]Kai[/name].