I have a 10 year old Edie. I never thought about Edith at the time, as a birth certificate name.
I still love the name Edie. I just think it manages to be cool, pretty and a little harder edged and a bit less popular than other -ie names. Many of which I like too. I feel like I should love Edith too, but just can't quite. Perhaps because I'm more the Sedgwick sort, than Downton.
I almost went with Sylvie. I adore that. But can't stand Sylvia. It's quite fascinating how we respond so differently to names that are almost identical.