Elen is from the Welsh / North Sami Elen — Celtic-Sami rendition of Helen — from the Greek Helene (bright, torch). Elen is one of the Welsh feminine names.
Elen 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 Elen reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.