Halo comes from the Greek halos, originally meaning a circular threshing floor — later applied to the ring of light around the sun or moon, then to the radiant disc behind saints in Christian iconography.
Halo entered the U.S. top 1000 as a girls' name in 2019 and has been rising.
Halo 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 Halo reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.