Prince Louis is the youngest child of Prince William and Princess Kate – and much like his siblings was given more than one name at birth.

When Prince Louis’ full name was announced five days after his birth, the choice surprised many.

Louis had not been high amongst bookmakers’ predictions, with seemingly the only existing connection to the name coming in the form of King Charles’ great uncle and mentor, Lord Mountbatten, who was named Louis.

The name also does not have a strong royal history in the same way that his older brother’s name does, given six Kings in British history have, so far, used the name George.

On the other hand, Louis’s middle name Arthur had been the favourite among bookies to be chosen as the baby’s first name.

Unlike Louis, Arthur does have a strong pedigree. It was the name given by Henry VII to his first-born son, who died before he could claim the throne, meaning that Henry VIII became King upon his father’s death.