Royal baby name odds: Alexandra, Charlotte and Diana are the favourites with bookmakers

While Alexandra, Victoria and James top the list of likely Royal baby names – Ladbrokes are also offering odds on Tulisa at 500/1, Chardonnay at 250/1 and Barack at 200/1.

And bets have been placed on them. “Money talks,” says Jessica Bridge, a Ladbrokes spokesperson, explaining the difference in odds.

“Alexandria opened at 33/1, but some significant bets of around £100 and £200 brought the odds right down.”

The largest bet yet was for a £1,000, placed in Northamptonshire, where William’s uncle, Earl Spencer resides. An insider tip, perhaps?

There is much speculation that the couple will pay homage to a Royal family member by naming the baby Elizabeth, Charles, Philip, or Diana.

Bets are also being taken on number of names excluding surname, which will be Mountbatten-Windsor. The Duke of Cambridge has four: William Arthur Philip Louis.

Punters may have to wait to collect their winnings – the monarchy traditionally takes its time when announcing names, with Charles’ not announced for a whole month.