Aelwen is from the Welsh Aelwen — ael brow + gwen fair/white/blessed — fair-browed, blessed-of-brow. Aelwen is one of the Welsh feminine names — central to traditional Welsh cultural heritage. Welsh feminine name reflecting Celtic Indigenous heritage.
Aelwen 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 Aelwen reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.