Mind if a total outsider offers some input?
As a very general rule, some railroad names indicated places they operated, or hoped to reach, etc. Typically, they started with the origin name, and added their hoped for destinations. Examples:
Missouri-Kansas-Texas
Chicago Burlington & Quincy
Missouri Pacific
St. Louis - San Francisco
Etc.
Using the above logic, your PNW name would be hard pressed to fulfill its destination. What is northwest of the Pacific Ocean?
Perhaps you can give some more head scratching as to where you envision your empire having started, and where it was headed. Maybe a map can offer some food for thought. Perhaps it could be Northwest & Pacific, or something. However, the bottom line is it is YOUR railroad… you can name it whatever you’d like.
FWIW, I’m of the opinion that when choosing a name for a freelanced road, and one wants it to suggest locale as well as sounding plausible, then the above logic employed by the prototypes works nicely. Here’s an example of my previous freelanced HO road:
Kansas City & Gulf
I modeled a small portion of its “Ozark Subdivision”.
The railroad name and subdvision name helped those that saw it to have an idea of the route’s origin and destination, as well as a gave them a general idea of where in the US it ran. The name of the subdivision gave an even more specific hint as to what section of it they were looking at.
For a modeler that is trying to “Proto-lance”, the name of the freelanced line, the name of the subdivision being modeled, even the names on the layout, are VERY important, for they are the main avenue in which to convey information to the viewer. I always enjoyed that part of creating a proto-lanced theme.
Good luck and have fun!
Andre Ming