Some of us are purists when it comes to mythologies and nationalities. Sorry to be that kind of person, but it's kind of like expecting good science in my science fiction.
I generally agree, but the similarity to specific national patterns while trying to be wholly-invented seems inconsistent. Any author is welcome to be inconsistent and even purists will over look it if the story is good. But consistency can make the reading easier for more readers, like me, who have a hang up. My hang up may be a personal problem no one else need worry about, but I prefer authors who make efforts at consistency.if it is set in a wholly-invented world, then there is no reason to expect that names, nationalities, mythologies, or anything else would follow similar patterns to those found in real history.