The term 'Land of the Leprechaun' is a reference to the Republic of Ireland, which is also known as EIRE. EIRE is the Irish Gaelic name for the country and is also the four-letter answer to the crossword puzzle. The Republic of Ireland is an island nation located in the North Atlantic Ocean and is known for its lush green landscapes, rolling hills, and friendly people. It is also home to many mythical creatures, such as leprechauns, which are said to bring luck and fortune.