Egeria was a Roman water nymph and prophetess who, in legend, counselled the wise king Numa.
Her name has come to mean a trusted woman adviser — clever and calm.
Egeria 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 Egeria reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.