Elle is the French feminine third-person pronoun ("she, her") — also the definite article in some Romance dialects. A top-200 US baby name since 2018. "Elle" is also Reese Witherspoon's character in Legally Blonde (Elle Woods, 2001).
Elle 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 Elle reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.