Sarai is from the Hebrew Śāray (שָׂרַי — my princess) — the original name of the biblical matriarch Sarah before God's covenant renaming. Sarai Sanjinés — Bolivian-American writer. Sarai Jones — modern American figure. Princess Sarai — Hebrew biblical heritage naming.
Sarai 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 Sarai reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.