Sheyna (שיינע) is the Yiddish word for "beautiful," used as a feminine name.
Sheyna was common in Ashkenazi communities; the anglicized form Shana or Shaina has been used in the U.S. since the 1960s.
Sheyna 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 Sheyna reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.