Please take a look at this:
External Link: [
http://wiki.travellerrpg.com/Miku_(Vl_1743)_(world) ]
*** Should the world entry that now reads "local nobility" be rephrased in your opinion? Would "Imperial High (Landed) Nobility" be more accurate? That essentially means "rank nobility", correct? ***
High = Landed
Rank = Ceremonial
That world is at 1734. There is no 1743.
The full UWP for Miku lists only a Knight, so the only High/Landed Nobility directly associated with Miku is that Knight. Knighthoods are not hereditary by default. Miku might also fall under the less direct influence of a Marquis, Viscount, or Count, and is of course within the territory overseen by a Duke. While the higher Landed Nobility from nearby might have an office at the Port, it will be a business office and mail drop more than anything.
A world like Miku might also have a Rank/Ceremonial Noble in residence, but they are not going to be reflected in the UWP. Miku's impact on the Imperium is likely as a smallish specialty shipyard and exporter of exotic chemicals. With that TL it might well be a regional source for specialized chemically resistant goods such as protective clothing, shelters, and shipping containers. The need for a Ceremonial/Rank Noble in such a place is dubious, but hardly out of the question for a Referee to justify.
With a population of 100,000, the potential for one or more families of Honor Nobility also seems like a stretch, but hardly out of the question. The descendants of a Knighted industrial chemist, or some Navy hero who just happened to grow up here. The family might bear a higher Honor title than the world warrants, but if they have any Landed Title above Knight that Title bearer holds it for another world (which makes one wonder why the family stays here...). The Landed Knight in residence here might even be a member of such a family, though in most cases he'll have come by his Knighthood honestly, and the Knights that preceded him and who will follow him in the position may not be relatives.
As for truly "Local" nobility, the world is listed as Balkanized. Multiple monarchies seem unlikely with only 100,000 people total, since the separate nations are going to be Pop 4 at best, and the atmosphere works against the idea of many small settlements that have evolved past what were probably corporate origins, if only because every settlement takes a lot of effort just to not die in an Insidious atmosphere. Potentially quite amusing in that Girl Genius "Kingdoms Under Paris" sort of way, but not terribly likely.