Erin is the poetic Irish name for Ireland — from the Old Irish Ériu, the mythological mother goddess of the land. Erin Murphy (Bewitched Tabitha, 1966-1972). Erin Napier — Home Town HGTV designer. "Erin go Bragh" — Irish slogan "Ireland forever."
Subject of countless American environmental-justice histories.
Erin does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Erin reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.