  Contrary to the article, Souhern Ireland's existence as a political entity did not end on 6 December 1922. Northern Ireland and Southern Ireland became autonomous regions of the newly created Irish Free State on 6 December 1922 under terms of the Irish Free State Constitution Act 1922. I cannot find evidence that Southern Ireland ever ended. I speculate that the term Southern Ireland may not have been used because the Free State and the Republic of Ireland claimed sovereignty over the whole island in their constitutions. I would be greatful if someone can shed light on this.   