Seren is the Welsh word for "star" — used as a given name in Wales for centuries, recently embraced widely.
Seren entered the top 100 girls' names in Wales in 2003 and has remained popular. Outside Wales it remains rare but is rising.
Seren 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 Seren reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.