Earlier quoted context omitted.
FWIW 'gwynne' is typically a male's name. [edit - but in this case looks very much female]
I have never heard of that association. The Wikipedia article lists 11 notable people with it as their first name, and the gender distribution is just about half and half.
And the root means "white", which if it's going to be coded as one sex or the other is again always going to be female.
I would never have expected the name to be masculine. I'm surprised to see males reach 50%. (Actually, in the Wikipedia list, 55%.)
(Looking into it a little farther, the same name in Irish appears to be Finn, a legendary (male) hero. Probably relevant.)