Gwynn \gw(y)-nn\ as a girl's name (also used as boy's name Gwynn), is a variant of Guinevere (Welsh), Gwen (Welsh), Gwendolyn (Welsh) and Gwyn (Welsh), and the meaning of Gwynn is "fair one; white and smooth, soft; fair, white, blessed, holy; fair bow; blessed ring".

The baby name Gwynn sounds like Gwynne, Gwynna, Gwenn and Gwinn. Other similar baby names are Glynn, Gayna, Glyn, Glenn, Gwenny, Gwynda, Gwenni, Gwenna, Gwinne, Gwinna, Gwin, Lynn, Rynn and Wynn.