Gwyneth is a Welsh name from gwynaeth, meaning "blessed" or "happiness." The name also derives from Gwynedd, the principality of northwestern Wales.
Gwyneth Jones is the Welsh opera soprano.
Gwyneth 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 Gwyneth reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.