Gwenness \gwe-nne-ss\ as a girl's name is a variant of Gwyneth (Welsh), and the meaning of Gwenness is "happiness".
The baby name Gwenness sounds like Genessa, Genisa and Gianessa. Other similar baby names are Gwenneth, Glennys, Glennis, Gwenny, Gwennore, Gwennora, Gwennola, Gwennie, Gwenn, Gwenni, Gwenna, Gwinneth, Gwennetta, Gweneth and Gwinne.