Dasha is from the Russian Dasha (Даша) — diminutive of Darya (Дарья) — from the Persian Dārayavauš (possessor of goodness). Dasha Zhukova (Daria Zhukova, born 1981) is a Russian art collector, businesswoman, and philanthropist — co-founder of the Garage Museum of Contemporary Art in Moscow (2008) — widely considered one of the contemporary art institutions in Russia and Eastern Europe. Previously married to billionaire Roman Abramovich. The diminutive Dasha is among the most-popular Russian feminine nicknames, alongside Sasha (Alexandra) and Masha (Maria).
Dasha 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 Dasha reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.