Numbered Homeworld: Averted.  As we mentioned way back in Naming Your Colony World, inhabited systems generally do get named objects, if only because they’re easier to remember.  Even uncontacted alien homeworlds get names, often a pronounceable transliteration of whatever the local name is, out of some respect for local sensibilities… and ease of memory/reference.

(Yes, this implies that Vonis Prime isn’t really called Vonis Prime…)