Erin

A topographic map of Ireland, after which Erin is named
Pronunciation	/ˈɛrɪn/
Gender	Mainly Female (with some Male)
Word/name	Hiberno-English derivative of Irish “Éirinn”
Meaning	Ireland (West), green water,
Region of origin	Gaelic & Celtic
Related names	Ehrynn, Erinn, Eryn, Erynn, Iorn
Popularity	see popular names

Erin is a Hiberno-English derivative of the Irish word "Éirinn". "Éirinn" is the dative case of the Irish word for Ireland - "Éire", genitive "Éireann", the dative being used in prepositional phrases such as "go hÉirinn" "to Ireland", "in Éirinn" "in Ireland", "ó Éirinn" "FROM IRELAND". The dative has replaced the nominative in a few regional Irish dialects (particularly Galway-Connamara and Waterford). Poets and nineteenth-century Irish nationalists used Erin in English as a romantic name for Ireland. Often, "Erin's Isle" was used. In this context, along with Hibernia, Erin is the name given to the female personification of Ireland, but the name was rarely used as a given name, probably because no saints, queens, or literary figures were ever called Erin.

According to Irish mythology and folklore, the name was originally given to the island by the Milesians after the goddess Ériu.

Erin go bragh ("Éire go brách" in standard orthography, dative "in Éirinn go brách" "in Ireland for ever"), a slogan dating from the 1798 revolution, is often translated as "Ireland forever". The etymology of the word as it drifted throughout the Gaelic region gave rise to its use by the early Scots to both mean Ireland and "west" - as Ireland lies to the west of Scotland.

As a given name, Erin is used for both sexes, although, given its origins, it is principally used as a feminine forename. It first became a popular given name in the United States. Its US popularity for males peaked in 1974 with 321 boys registered with the name.Erin is also a name for Ireland in Welsh, and is one of the 20 most popular girls' names in Wales.