Prince William and Kate Middleton's third child will not have a last name, according to Town and Country mag.
Royal babies are usually given formal titles after they are born that are made up to 15 words and tend to only use Prince or Princess in front of their given name.
With the birth of Prince William and Kate Middleton's third child taking place any day now, many royal fans are curious as to whether he or she will adopt the surname Prince Phillip and Queen Elizabeth often use on certain occasions: Mountbatten-Windsor.
According to royal historian and writer of the Royal Musings blog Marlene Eilers Koenig, the royal baby will not.
'The royal baby will not have a last name,' she reveals. 'The name on the birth certificate will say HRH Prince or Princess, and all three names of Cambridge.'
The three names of Cambridge refers to the three first names given to each royal child. For instance, Prince George's three first names are George Alexander Louis, and Princess Charlotte's three first names are Charlotte Elizabeth Diana.
'The House name is Windsor and the family name for those who do use a surname is Mountbatten-Windsor,' Koenig adds.
Koenig also tells TownandCountrymag.com that Prince George, the royal baby's oldest sibling, is listed at school with the surname Cambridge, which is part of his father and mother's official titles as the Duke and Duchess of Cambridge.
For everything you need to know about the royal baby, see here.