Ishtar (𒀭𒈹) is the Akkadian and Babylonian name for the Sumerian goddess Inanna — goddess of love, fertility, and warfare. The biblical Esther's name may derive from Ishtar. The Ishtar Gate (575 BCE) was the eighth gate of Babylon.
Ishtar is rare but distinctive.
Ishtar 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.
In Pythagorean numerology the letters of Ishtar reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.