Galatea (Γαλάτεια) comes from the Greek gala, meaning "milk" — referring to her milk-white complexion. In Ovid's Metamorphoses, Galatea is the statue carved by Pygmalion and brought to life by Aphrodite.
Galatea is rare as a given name but distinctive.
Galatea 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.
—
In Pythagorean numerology the letters of Galatea reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.