Harry and Meghan’s new titles: Duke and Duchess of Sussex

Titles are decided by the Queen when a relative either comes of age or gets married, CNN reported. The queen can choose from five titles for a man, CNN reported -- duke, marquess, earl, viscount or baron. For a woman, the choices are duchess, marchioness, countess, viscountess and baroness.

The titles of duke and duchess are the highest titles among the five possibilities.

It has been 175 years since a man held the title of Duke of Sussex. That was Prince Augustus Frederick, who was the sixth son and ninth child of George III, the BBC reported. He died in 1843 at age 70.