Immaculada is from the Catalan Immaculada — from the Latin immaculātus (without stain, immaculate) — referring to the Catholic dogma of the Immaculate Conception of Mary. Immaculada is one of the Catalan + Valencian feminine Marian-devotion names — Catalan-language equivalent of the Italian Immacolata + Spanish Inmaculada. The Festa de la Immaculada (Feast of the Immaculate Conception, December 8) is one of the Catalan + Spanish + Italian-Iberian holy days.
Immaculada 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 Immaculada reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.