Goewin is the Welsh mythological figure of the Fourth Branch of the Mabinogion — the footholder of King Math fab Mathonwy. In Welsh tradition the king's feet had to rest in a virgin's lap; her ritual position was at the heart of the kingdom.
Featured in the Mabinogion.
Goewin 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 Goewin reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.