Arielle is the French form of the Hebrew Ariel — ari ("lion") + el ("God") — "lion of God," a name used 5 times in the Hebrew Bible (Isaiah 29:1-7 uses it as a poetic name for Jerusalem). Arielle Caputo — American gymnast.
Arielle 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 Arielle reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.