UPDATE: No news on letters patent. The baby remains Master Archie Harrison Mountbatten-Windsor.
The Duke and Duchess of Sussex now have a healthy son, the seventh in line to the British throne.
The baby may possibly carry the title Earl of Dumbarton. It was first held by George Douglas, given to him by Charles II in recognition of his military service. The title was revived and given to Harry by Her Majesty the Queen on the day of his wedding.
Its military connotations are a perfect fit for Prince Harry, who has served overseas and continues to be a part of Invictus, the organization that supports the rehabilitation of wounded soldiers. Now that Harry has a son, the little lad is able to use one of his father’s subsidiary titles, the Earl of Dumbarton being the most likely. One day, he will become the Duke of Sussex.
When Harry and Meghan’s son is old enough to marry, his wife would be styled as Countess of Dumbarton. Neither will be HRH (currently young Sussex is not).