Eir is the Norse goddess of healing and medicine — one of Frigg's handmaidens. The name means "mercy" or "help."
Eir is rare as a given name but rising in modern Scandinavia.
Eir 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.
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In Pythagorean numerology the letters of Eir reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.