Mahina is the Hawaiian word for "moon" — also "month" (since traditional Hawaiian calendars are lunar).
Mahina is widely used in Hawaii and rising in the U.S.
Mahina 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.
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In Pythagorean numerology the letters of Mahina reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.