Encarnación is the Spanish word for "incarnation" — referring to the Incarnation of Christ in the Virgin Mary. A traditional Spanish Marian feminine name.
Encarnación is widely used in Spain and Latin America.
Encarnación 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 Encarnación reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.