Former Bath Rugby star Mike Tindall and Zara Phillips have named their baby daughter Mia Grace.
Tindall tweeted the news to fans, saying: "For everyone who has asked what our daughters name, it's Mia Grace Tindall."
Zara gave birth to the baby girl, who weighed 7lbs 12oz, last week.
She is 16th in line to the throne and is the Queen's fourth great grandchild.
Bookies had been predicting a more traditional name, with Charlotte, Victoria, Anne and Elizabeth among the front runners.
But bookmakers William Hill said Mia entered the betting yesterday afternoon at odds of 16-1 and finished as the 5-1 favourite.
William Hill spokesman Rupert Adams said: "It looks like a few people managed to get Mia correct and we have now lost for the second time running.
"We might have to close that betting early for the next royal baby – be it William or Harry."
Tindall took to Twitter after the birth to describe his joy at becoming a father for the first time, saying it was "definitely the best day of my life".
Olympian Zara gave birth to her first child at Gloucestershire Royal Hospital with her husband at her side.
The baby girl follows Zara's brother Peter Phillips' two children and Prince George to become the Queen and the Duke of Edinburgh's fourth great grandchild.
Peter Phillips' daughters Savannah and Isla Phillips were also born at Gloucestershire Royal Hospital in Gloucester.
