Natalie or Natalia is a lovely name and classic enough that it is not dated (we only see that from our own generation's point of view). Remember your children will hardly ever meet a Natalie they will be drowning in Avas, Amelias, Emilys, Freyas etc. I also have a best friend who is called Natalie and she is a very intelligent, beautiful, funny and caring person so only a thumbs-up from me.
Natalie also has a cheeky, sexiness to it on a grown woman, it's not run of the mill.