Dwynwen in modern Welsh naming — has experienced significant revival in 21st-century Wales amid broader Welsh cultural revival movement.
and St Dwynwen's Day.
Dwynwen 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 Dwynwen reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.