Old Name for Ireland is a term used to refer to the various names that have been used to describe the island of Ireland throughout its history. The most common of these are ERIN (4 letters), Ierne (5 letters), and HIBERNIA (8 letters). ERIN is an anglicized version of the Irish word Éireann, which is the modern Irish name for the island. Ierne is an older Latin form of the same word. HIBERNIA is a Latinized form of the ancient Greek name for the island, Ivernia.