Andreea is from the Romanian Andreea — feminine of Andrei — from the Greek Andreas (manly, brave, strong). Andreea Răducan (born 1983) is a Romanian artistic gymnast — among the most-celebrated Romanian gymnasts of her generation.
Andreea 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 Andreea reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.