Yamuna (यमुना) is the Sanskrit name of the sacred Yamuna River — the second holiest river in Hinduism after the Ganges. The river is personified as the goddess Yamuna, daughter of the sun god Surya and twin sister of Yama, the god of death.
Yamuna is widely used across India.
Yamuna 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 Yamuna reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.