Isis (𓊨𓏏𓆇) is the ancient Egyptian goddess of motherhood, magic, healing, and rebirth — wife of Osiris and mother of Horus.
Isis as a name is rare in modern Western naming due to associations with the militant group. Used historically and still used in religious-revival communities.
Isis 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 Isis reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.