Nancy Drew, of course. Who doesn't remember (well, you would if you'd been a girl, anyway) Nancy with her titian hair and her friends, boyish George and plump Bess. And her roadster. Didn't you want to hop in and zoom (perhaps not zoom) off? Carson Drew was her father, and Hannah Gruen the housekeeper. Yes, Nancy had lost her mother at 3 or at 10, depending on which book you read.
Carolyn Keene, the author, was apparently many people, but Nancy herself was the original creation of a book packager named Edward Stratemeyer, who also created the Hardy Boys.
There is quite a bit under this Wiki link . . .