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Forget Fifi or Fido!

When it came to naming their brand new cocker spaniel puppy, royal newlyweds Prince William and Kate Middleton went a much more sophisticated route.

After Middleton, 30, let the closely guarded secret slip when talking to a group of school children at Rose Hill Primary School Tuesday, a Palace source confirmed to Us Weekly that the couple calls their new addition Lupo, which means 'wolf' in Italian.

Why the moniker? "There is no significance in it apart from they liked the name," a royal aide told the U.K. Daily Mail shortly after Middleton spilled the beans.

Adopting the puppy in January, the Duke and Duchess of Cambridge first met the canine over the Christmas holiday in Bucklebury, where Middleton grew up and where her parents Michael and Carole still live.

"He belongs to a litter of cocker spaniels from one of Carole Middleton's friends near home," a Palace aide told Us at the time, adding that the couple took the pup home for a brief fostering period before making the adoption official.

"William and Catherine fell in love with the pup instantly and it wasn't long before they decided to keep him," the source says.

Tell Us: What do you think of the royal puppy's name?