Gwynith \gw(y)-ni-th\ as a girl's name is a variant of Gwyneth (Welsh), and the meaning of Gwynith is "happiness".
The baby name Gwynith sounds like Gwenith, Gwenyth, Gwynneth, Gwinyth, Gwineth, Gwenita and Gweneth. Other similar baby names are Ganit, Gwynne, Gwynna, Gwynn, Gwyn, Gwynda, Gwynedd, Gwinneth, Gwenneth and Ranith.