Gwyneth

Possibly a variant of GWYNEDD or a form of Welsh gwyn meaning "white, fair, blessed". It has been common in Wales since the 19th century.

GWYNEDD   female & male   Welsh
From the name of a region in Wales, named after an ancient kingdom, which may be derived from the old Welsh given name Cunedda.
EQUIVALENTS
ENGLISH: Gwyneth
WELSH: Gweneth, Gwenith, Gwenneth, Gwenyth, Gwyneth
OTHER FORMS
ENGLISH: Venetia
LITERATURE: Gyneth
WELSH: Gwynedd