The world has never had a good definition of liberty, and the American people, just now, are much in need of one. We all declare for liberty; but in using the same word we do not all mean the same thing.
The official English name was changed by the country's government from the Union of Burma to the Union of Myanmar in 1989, and still later to the Republic of the Union of Myanmar, which since then has been the subject of controversies and mixed incidences of adoption.
India is named after the river Indus (the original name is Sindhu, that has been corrupted to Indus by the Greeks). Republic of Congo & the Democratic Republic of Congo is both named after river Congo. Niger and Nigeria are named after the river Niger. Zambia from Zambezi river. Uruguay, Paraguay, Jordan are other nations named after eponymous rivers.