"Kling"? A moon of Q'onos perhaps? A colony?
Not a location at all, IMHO, but rather the Klingon equivalent for "mankind". A traitor of Kling is akin to a traitor of mankind. Or perhaps a traitor of the Klingon spirit, Klingonness, whatever.
I like this, Kronos is the homeworld, but Kling is the ethos of the people.
The species name Klingon come from who they are, not where they're from.