Ruth is the official creater of Barbie, she got her idea from her younger daughter, "Barbera" watching her play with her paper doll's, the idea of the doll came from an eariler doll from German, named Bild Lilli which was named after some cartoon character i suppose.

Here's more info on her if you wanna check it out:

Who handler image

Ruth at her earlier year's from creating the doll.