not the tartan I thought

[OC Richard]

I imagine that I'm a fairly good tartan-spotter.

And when I saw a kilt in the right-hand tartan on Ebay I thought "that's Holyrood with a white ground, probably called Dress Holyrood or something".

When the two were compared, one might think that, no?

No. Googling "dress Holyrood" only produced dresses made in Holyrood tartan.

Then on accident I came across the same tartan (below, right) Holyrood with a white ground...but it's called Weathered Blue Stewart.

Makes me wonder if Holyrood with a white ground is called Weathered Blue Stewart, why not call Holyrood with a blue ground Weathered Blue Stewart Hunting? (Weathered Blue Stewart Blue wouldn't work! After all you wouldn't name a city The City of Daly City, would you?)