Well, my real name is Billy, which is supposed to be considered both male and female. Though I've never run into any females with the name. It kind of suits me though, having a 'gender-neutral' name.
I'd also add Jamie to the list. I know a few girls and a few guys with that name.
And as a side note, in French, the pronounciation of 'Michael' sounds almost like 'Michelle' in English. XD