Aoibhinn (pronounced "ee-veen") is the Irish word for "radiant beauty" or "of pleasant form." The variant Aoibheann was historically used in noble Irish families, including as the name of a daughter of King Brian Boru.
Among the most popular modern Irish feminine names.
Aoibhinn 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 Aoibhinn reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.