Dragana is from the Serbian / Croatian Dragana — feminine of Dragan — from the Slavic drag (dear, precious). Dragana is one of the Serbian feminine names.
Dragana 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 Dragana reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.