The name Gwyneth is a girl's name of Welsh origin meaning "blessed, happy". Gwyneth and is often added to lists like Baby Names That Mean Happy and discussed in our forums with posts like "Girls Makeover - Two Middles".
From the experts:
Because of Gwyneth Paltrow, this has almost become a one-person name, but not in the prohibitive there's-only-one-Oprah sense. Also seen as Gwenyth and Gweneth, this mellifluous appellation is definitely becoming more and more appreciated by American parents-- enough to land it on this year's Top 1000.
Gwyneth is an Anglicized form of Gwynedd, the name of an ancient Welsh kingdom. Gwyneth Jones is an acclaimed Welsh Wagnerian soprano.