Yaroslava the Wise (11th c.) was the legendary daughter of Yaroslav the Wise of Kievan Rus, who became Queen of France as Anne of Kiev.
Yaroslava is a compound name. Its parts are slava — each an attested element with a recorded meaning of its own.
Yaroslava 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 Yaroslava reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.