Sina is the moon goddess of Polynesian mythology, particularly in Samoa. She is also known as Hina across other Polynesian cultures. The name means "white" or "silver," referring to moonlight.
Sina is rising in the U.S.
Sina 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 Sina reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.