There are a few, although I generally prefer using more formal names for birth certificates. My rule of thumb is whether or not a professional woman/man would feel comfortable with the name.
Lucy,
Amy,
Nora,
Lena,
Nancy,
Molly,
Lara, Katia/Katya,
Anya,
Natasha,
Nadia, Tania/Tanya,
Jack,
Frank,
Max,
Luke.
Then there are all of the female names with diminutive suffixes like "-ette," "-een." I think they have been used so much that they have become names in their own right.