Rae is from the Hebrew rāḥēl (ewe — feminine of Rachel) or the Old English rǣ (a ray of light). Rae Sutton — Sutton Foster's daughter (born 2017).
Rae 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 Rae reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.