Yaroslava (Ярослава) combines the Slavic yaro (bright, fierce) and slava (glory) — "bright glory." Feminine of Yaroslav.
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.