its a persian, turkish, urdu word meaning land, we call england englistan, turkey turkistan,india hindustan,serbia serbestan, poland lehestan,saudi saudi arabistan, georgia gorgistan,armenia armenistan, bulgaria bulgaristan, mongolia mogholistan, hungary majaristan, greece yunanistan, and croatia hirvatistan
Its just like how -land is used as a suffix for many European countries or regions. Both have the same meaning. Like England, Scotland, Ireland, Finland, Poland, Greenland, Iceland, Switzerland, Netherlands and even Deutchland.
Is it a regional thing?
Good job!