What processes lead to the simplification or diversification of the spectrum of names ITRW? Is Europe so extremely diverse in this respect because of a splintered culture, or because of a highly integrated one that frequently cross-steals? Is China so extremely simple because of a long-running highly centralized and organized culture, or because of a fundamentally rural one where names never really mattered and only really amount to a couple of variants of X scribbled on a document? Or are these things dictated by the very nature of the language itself, the European way catering for diversity or ill catering for stability and system? As an extrapolation, would the significance of individualistic names increase or decrease in an advanced society that manages its information through complex technology?
Klingons might be stuck with a narrow range of names because names really don't matter. But what is the mechanism of that? Romans of old had throwaway names, a typical one being "Fifth Son", and did not believe in surnames as such, yet decorated themselves with acquired names at every possible turn. Do Klingons do that? In John M. Ford's novels and RPG material, self-acquisition of Names was a key idea. Is this inconsistent with onscreen Klingon culture?
OTOH, Klingon religion might outright dictate that everybody be a Jesus Maria or a Maria Jesus of some sort. This regardless of whether the names come from concepts, ideals or hallowed ancestors and heroes. This paints a picture of a wholly different culture, one where self is of little import, and fate is sealed at or before birth along with name.
OTTH, we know the Klingon culture is diverse and dynamic, down to the very bodies of the Klingons themselves. Perhaps sticking to a narrow set of names helps them retain their identity when everything from their government to the number of their nostrils changes? This brings the sticking to names back to the realm of taking control of one's fate rather than resigning to it.
I don't think we can really argue that we only ever witness the warrior class or the ruling class, but there might still be layers to Klingon society that we are missing, and those might have different naming practices, too. The one where everybody for some reason is Kor, son of Duras, grandson of Kang, great-grandson of Kor still is the one warranting our speculation...
Timo Saloniemi