Eloise comes from the Old French Heloise, itself from the Germanic Helewidis — composed of heil (healthy, hale) and wid (wide).
Today Eloise sits in the U.S. top 75 and is climbing fast.
Eloise 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 Eloise reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.