Gwynna \gw(yn)-na\ as a girl's name is a variant of Guinevere (Welsh), Gwendolyn (Welsh), Gwyneth (Welsh) and Gwyn (Welsh), and the meaning of Gwynna is "fair one; white and smooth, soft; fair bow; blessed ring; happiness; fair, white, blessed, holy".

The baby name Gwynna sounds like Gwynne, Gwynn, Gwenna and Gwinna. Other similar baby names are Gwynda, Chynna, Gayna, Genna, Gianna, Gionna, Geonna, Ginna, Glenna, Glynn, Gwenny, Gwenn, Guinna, Guenna, Gaenna, Gunna, Gwenni, Gwinne, Gwinn and Lynna.