Sana is from the Arabic sanāʾ (سناء — brilliance, radiance, splendor) and parallel Japanese sana (砂奈 — sand+name). Princess Sana — Arabic-Japanese-Korean heritage naming.
Sana 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 Sana reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.