Saara is the Finnish form of Sarah — from the Hebrew śārâ, meaning "princess." The double-A reflects the Finnish long vowel.
Saara Aalto (born 1987) is the Finnish singer who finished second on The X Factor UK 2016.
Saara 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 Saara reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.