Arinniti was the great Hittite sun goddess of Arinna, chief deity and protector of the kingdom.
Arinniti 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 Arinniti reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.