That is an excellent blog post, Thaddeus. If there is a good reason to call the rulers in your world something other than Kings and Queens, if it is, as you demonstrate, a true part of the setting, then it is well worth doing. But if they are, for all intents and purposes, just ordinary kings and queens, then inventing new words can be confusing for the reader and serves no good purpose.
Any one of the historical examples you provide, however, could be the inspiration and the jumping off place for a story all in itself.
I like your blog post, too, Juliana. I think isolation for a writer is actually a fairly new thing and weirdly enough developed at a time when communications became easier and easier.
But back in the day when people sat down and wrote long, thoughtful letters to each other, writers did communicate with other writers and provide each other with encouragement, advice, and fellowship. In a big city, like London or New York, where there were many writers within visiting distance of each other, they would meet together over dinner or cocktails. And of course there were groups like the Inklings, where writers would read their works to each other for commentary.
Now writers can meet online and something has evolved that is a little like the old days of sending letters back and forth and a little like those conversations over dinner and cocktails, and represents, I think, the best of both. The internet is also a way to find writers in your area and form a group that meets face-to-face with all the advantages that offers.
But it can take new writers a while to find a group of either kind that they find congenial and helpful at the same time, and that process can be daunting. Articles like yours may encourage some of them.