What do you think of the name Jillie?

My best friend is named Jill, and she really hates her name, but it being so short and simple, there isn't much room for serious nicknames. The only thing we could come up with was Jillie, not the most original, I know, but we wanted some outside opinions. Do you like the name Jillie? Can you imagine a teenager/adult called Jillie? What do you imagine a Jillie to look like? Merci beaucoup :)