Antigoni (Αντιγόνη) is the modern Greek form of Antigone — "against birth." The heroine of Sophocles' tragedy, who defied King Creon to bury her brother Polynices in obedience to divine law.
Used widely in modern Greece.
Antigoni 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 Antigoni reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.