Ireland's nickname is often referred to as EIRE (4 letters), ERIN (4 letters) or Emerald Isle (11 letters). EIRE is the Irish Gaelic name for Ireland and is derived from the Old Irish word Ériu, which was the name of a goddess in Irish mythology. ERIN is an anglicized version of the Irish Gaelic word Éirinn, which means 'from Ireland'. The Emerald Isle is a poetic term used to refer to Ireland due to its lush green landscape.