Disa comes from the Old Norse dís, meaning "goddess" or "female spirit." The dísir were female deities associated with fate and ancestral protection in Norse paganism.
Disa is widely used in modern Sweden.
Disa 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 Disa reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.