Whoops! While visiting Wales in 2010, Kate Middleton apparently once let her code name slip while speaking to a shopkeeper.
According to The Express, the 40-year-old goes by Daphne Clark when she's away, and Prince William is known as Danny Collins. Both have the initials DC, since it is similar to Duke and Duchess of Cambridge.
While William was at work — he was a search a rescue pilot at the time — Kate stopped into a watersports shop, where she asked if the shopkeeper named Dave Buckland could hold onto a wetsuit for her.
The mom-of-three said her name was "Mrs. Cambridge."
"He was looking straight at her and actually commented that it was quite an unusual surname," a source told the Daily Mail about the incident. "He hadn’t a clue who she was. She just smiled and said she’d be back. He hasn’t lived it down since."
Kate and William's eldest son, Prince George, 8, also has a unique fake name! When he was with his grandmother Carole Middleton, one woman asked the tot what his name was.
“I was asked by a police minder not to take a photo of the children, which I didn’t, but George started stroking my dog," the woman said. “Just to be friendly I engaged in a bit of small talk and I asked George what his name was, even though obviously I knew it. To my astonishment he said, ‘I’m called Archie’ with a big smile on his face. I don’t know why he calls himself Archie but kids often play with their names, and I think it’s lovely.”