Syldavia

But the name of Grand Fenwick doesn't occur in any history book, or show up in any atlas, unless it also maps Ruritania, Syldavia, Borduria, Oz or even Shangri-La.

Finally, the sovereignty of the island has been continuously claimed by two sovereign states, Syldavia and Borduria. Syldavia is a medium size sovereign State with a large population, mainly Muslims.