Haruna is from the Japanese haru (春 — spring) + na (奈 or 菜 — greens, vegetable). Haruna Reservoir (Haruna-ko) — major Japanese lake. Haruna Yabuki — Japanese former model.
Haruna 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 Haruna reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.