Prince William, Kate Middleton, and the other members of the royal family used to give each other hilarious nicknames.

For instance, the Duchess of Cambridge used to call her husband “baldy” because of his thinning hair. Prince William’s friends also called him Steve while he was at the University of St. Andrews to keep his identity a secret from the other students.

But a royal source just revealed that there’s a deeper reason why members of the royal family give each other hilarious nicknames.

“The royals are not very good at communicating with one another so this is one way around it. Nicknames are a way of taking the family tension out of things,” the source said.

According to a royal insider, Prince William and Middleton have always been playful in private. This may be the reason why their nicknames for each other are quite hilarious.

“It’s done with affection usually and there are grains of truth about what one feels about another,” the source said.

When Prince Harry was still a young boy, Princess Diana used to call him GHK or Good King Harry. Prince William fondly calls his daughter, Princess Charlotte, mignonette. In school, Prince George’s schoolmates refer to him as P.G.

Middleton also once called Princess Charlotte “Lottie,” and Prince Charles calls Meghan Markle Tungsten. Prince William and Middleton’s kids call Queen Elizabeth II Gan-Gan, and they also call their dad Pops.

Prince George calls Prince Charles “Grandpa Wales,” and when Prince William and Prince Harry were still young, they used to call their grandmother, Granny.

Years ago, Prince Harry also referred to Middleton as Cath. During an interview, a reporter asked the Duchess of Cambridge if it is only Prince Harry that calls her by that nickname. But the mom of three said that she’s not away of the moniker and said that she responds to almost any name.

Prince William, Kate Middleton
Prince William, Middleton meets with Irish Guards after attending the St Patrick's Day parade at Cavalry Barracks in Hounslow, where they presented shamrock to officers and guardsmen of 1st Battalion the Irish Guards on March 17, 2019 in Hounslow, England. Getty Images/Gareth Fuller-WPA Pool