Lailah is the modern American spelling of Layla — from the Arabic layla (night). A top-500 US baby name since 2010. In Jewish tradition, Layla / Lailah is also the name of an angel mentioned in midrashic literature as the angel who tends to spirits in conception. The poetic Arabic word layla (night) appears in the names Layla, Laila, Leila, and Lailah throughout Muslim, Jewish, and Christian families worldwide.
Lailah 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 Lailah reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.