Irish mythology also recorded the stories of a goddess named Ériu - she was the mother goddess of the Emerald Isle, and her name was pronounced much like Erin is pronounced today (Eru, rather than Erin, but quite close all the same). This protective, nurturing female spirit was thought to watch over the island and its people, along with her two sisters, Banba and Fódla, Together, the three goddesses formed a special and powerful trio. In Irish and Celtic mythology, the number three is actually quite sacred. When Christians came to Ireland and the old Pagan ways evolved into Christianity, the sacred number three began to represent the Father, the Son, and the Holy Spirit (The Holy Trinity).
Today, this lovely first name is more popular than ever - and not just in Ireland. Alternative spellings of the name Erin are myriad - this name may also be spelled as Aeran, Aerenne, or Aerin. Some celebrities with this traditional Irish moniker include Aerin Lauder (Estee Lauder heiress) and Erin Moran (from the old TV show, Happy Days). While baby boys may also be named Erin, the name is generally considered to be a female name. Boys named Aaron will not share the same name origin, despite the identical phonetics - the name Aaron has biblical origins.