Actually, Prince Edward is the Earl of Wessex, not a Duke.
Dangit. You're right and I'm wrong. But her name IS Sophie ;-)
I've had Duke of Sussex, Duke of Windsor on my mind....(also, why did the queen make him an Earl? I thought it was the norm for royal princes to be made Dukes?)
If I recall correctly, the rumor at the time was that Edward will be given the Dukedom of Edinburgh after Prince Philip passes away.