Hi there!
My name is
Gwendolyn and everybody always calls me
Lyn. I like my name. I like both variations, but I think if I had to choose, my favourite version would be
Gwendolen. If you don't like Lynn/Lyn or a variation, there are others you could use. However, I'm not a fan of
Len, it seems masculin to me...as if it's a nn for
Leonard.
I like Gwenny (spellt like this) or
Wendy a lot as nns for Gwendolen/Gwendolyn.
Thinking about it, maybe you could even get away with
Dolly...
~Lully Lulla~