The royals don't just have normal names like the rest of us - they also have grand titles that go with them.
But it's often not just one title they are given for life - as time goes by, they can be undergo many changes depending upon where they are in the line of succession and major life events.
So even though we know Kate as the Princess of Wales, her son as Prince George and Sophie as the Countess of Wessex, this does not necessarily mean they'll still go by these titles in the future.
