A strict royal rule means that while Meghan Markle is still a Princess of the Royal Family, she will never be known as Princess Meghan. After tying the knot to Prince Harry, Meghan was given the title of the Duchess of Sussex by the late Queen Elizabeth. However, she actually has a lesser-known official title - Princess Henry of Wales.The name was given to her in reference to Prince Harry's name at birth, which is Henry.This style of title is acquired by women when they marry into the Royal Family.