Gwyn \gw-yn\ as a girl's name (also used as boy's name Gwyn), is of Welsh origin, and the meaning of Gwyn is "fair, white, blessed, holy". Also short form of Gwendolyn or Gwyneth. A masculine name in Wales used as a feminine name in the English-speaking world.
Gwyn has 7 variant forms: Gwin, Gwinn, Gwinna, Gwinne, Gwynn, Gwynna and Gwynne.
For more information, see also related names Gwen and Guinevere.