Many countries have "land" in the end of it. like England, Poland, Switzerland, etc. which means the land of the English, the land of the Swiss, etc.
Many other countries have "stan" in the end of it like Turkmenistan, Kazakhstan , Afghanistan, etc. stan means land in their language, it become the the land of the Kazakh, the land of the Turkmen, etc.
My question is about "-ia". Many counties have "-ia" in the end, like Australia, Serbia, Nigeria, Croatia, Russia, Tunisia and many many more. I'm not sure where that come from or if it has any meaning?