I have never met anyone with the middle name
Frances (that I know of). I'm Canadian, and grew up in the 90s. I only ever encountered boys with the middle name
Francis (exact same pronunciation), but even then it was pretty rare. I wonder if
Frances as a middle name in the UK was inspired by or affected by
Princess Diana's popularity at all? That was her middle name.
I've come around to
Frances' charms, a bit. It's a clever sort of name, a nice green colour to me, and I love the nickname
Frankie. But I think I prefer
Françoise or even
Francine.
Frances has a bit of a downtrodden vibe to it - a sad sort of sensibility.