Mair is from the Welsh Mair — Welsh form of Mary / Maria from Hebrew Miryam (bitter/beloved/rebellious). Mair is one of the Welsh feminine names — central to traditional Welsh Christian heritage. Welsh feminine name reflecting Celtic Christian heritage.
Mair 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 Mair reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.