Aoibhin is from the Irish Aoibhín — radiant beauty, fair, lovely diminutive of Aoibheann. Aoibhin is one of the Irish feminine names — central to traditional Irish heritage. Irish feminine name reflecting Celtic Indigenous heritage.
Aoibhin 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 Aoibhin reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.