Sepideh (سپیده) is the Persian word for "dawn, the first light of morning." A poetic Iranian feminine name evoking the moment of light breaking.
Used widely in modern Iran.
Sepideh 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 Sepideh reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.