Etain (Étaín) is the heroine of one of the great Irish mythological tales, Tochmarc Étaíne — the Wooing of Etain. Reincarnated through forms across centuries, she is sought by gods and kings.
Etain is rare but rising in modern Ireland — chosen by parents drawn to Celtic legend.
Etain 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 Etain reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.