SHE WILL NOT BE KNOWN AS PRINCESS MEGHAN, BUT SHE WILL BE A PRINCESS.
Just as there was with Catherine, Duchess of Cambridge (aka Kate Middleton), there will likely be a debate in the media regarding whether Meghan Markle can be called Princess Meghan should she and Prince Harry wed. In short, she will be a princess, but she won't be Princess Meghan.
According to the customs of
THE QUEEN WOULD HAVE A SAY IN THE MATTER.
It has become
While nothing is for certain, it's very likely Harry would be given the title of Duke, and Meghan the title of Duchess once they are married.
BUT OF WHERE?
Royal Central, a website reporting on all things monarchical, is predicting Harry will be named the Duke of Sussex upon his marriage, a title that has been available for over a century. (The last Duke of Sussex was, the sixth son of , and an uncle of Queen Victoria's.)
"Most likely, he will be created a Duke. Sussex is available so [Markle] would be HRH the Duchess of Sussex," royal historian Marlene Koenig said. "Her rank would be a princess by marriage of the United Kingdom, Great Britain, and Northern Ireland."