“His titles will be Duke of Sussex, Earl of Dumbarton and Baron Kilkeel.
“Prince Harry thus becomes His Royal Highness The Duke of Sussex, and Ms Meghan Markle on marriage will become Her Royal Highness The Duchess of Sussex.
The Earl of Dumbarton has heavy military associations, as previous postholders have had significant roles in the British military, and suits Harry’s former military associations when he was a working royal.
Prince Harry is the third Earl of Dumbarton in British history, and the title had been vacant for hundreds of years.
