Nigel? Isn't That a Guy's Name?

I was listening to Saturday's episode of Car Talk. A woman called in and gave her name as Nigel. The guys questioned, "Nigel?" Isn't that a guy's name?" They continued with, "Do you have a brother named Sue?"

I looked around a little and even Wikipedia took a shot at her stating, "The boy's name Nigel \n(i)-gel\ is pronounced NYE-jel."

Nigel went on to say that her sister was named Jetta before the car was created and she is very sensitive about it.