I think it's pretty in theory, like
Gladys. But it's still really strongly wedded to a not very glamourous image, which works against it. One of my favourite neo-pagan authors is named
Phyllis, so that gives it a definite boost for me.
One of my classmates from university loved the name
Phyllis and she was the epitome of edgy-cool so that also gave it some cool points.
I like
Phyllida too.