Andromeda (Ἀνδρομέδα) comes from the Greek andros (man) and medon (ruler) — meaning "ruler of men." In Greek mythology, Andromeda was the princess chained to a rock as a sacrifice to a sea monster and rescued by Perseus. The Andromeda Galaxy — the nearest spiral galaxy to our own — is named for her.
Andromeda remains rare as a girls' name but is rising as part of the broader return of unusual classical names.
Andromeda 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 Andromeda reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.