No, it doesn't appear to be. An interesting note about the Duke of York title. Since its second creation in 1474, the title has never been passed on. Either the holder died without male issue or they became King. I also read something that stated that should Prince Harry's marriage predate the death of Prince Andrew, Harry could be created an earl, with the proviso that a new Duke of York will be created for him -- similar to Prince Edward and the dukedom of Edinburgh.
Quite honestly, I don't see Prince Harry
ever becoming Duke of York. Here's why:
If the Queen lives and reigns to the age of 100 (
which seems quite possible given the longevity of her mother) then the Prince of Wales will be 78 when he succeeds.. the Duke of York will be 66.. Prince William will be 44.. and Prince Harry will be 42.
Prince Harry will be married long before this (
I certainly hope), and will have probably been created a Duke upon marriage.
By this time, too, Prince William may well have more than one son, the second of which could eventually be created Duke of York.. Remembering that this could not happen until the death of Prince Andrew, when the title reverts to the Crown.
William's second son would be closer to the line of succession, and it would therefore make more sense that he be created Duke of York.
There's also a 12 year age difference between the Prince of Wales and the Duke of York. Even if longevity isn't a factor, the Duke of York could easily outlast his brother and live well into William's reign..
So it doesn't make sense to me that Harry would be created earl of anything. More likely is that he will get his own dukedom upon marriage as we anticipate his brother will.
And if Prince Andrew marries again and has a son..
well that's also still possible, isn't it? The man is only 50, after all..