Iphigeneia is from the Greek Ἰφιγένεια (Iphigeneia — strong-born, born to strength) — from Greek iphios (strong) + genos (birth). Iphigeneia is one of the Greek feminine names — central to traditional Greek tragedy heritage. Greek feminine name reflecting Greek tragic heritage.
Iphigeneia 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 Iphigeneia reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.