An (安) is the Vietnamese and Chinese word for "peace" or "safety." A unisex name with deep philosophical resonance (Confucian peace, Taoist tranquility).
An is widely used across East Asia.
An 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 An reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.