While ordinary people might address Queen Elizabeth II as "Her Royal Majesty" along with a bow or a curtsy, things are a little more relaxed behind closed doors.

A Quora user asked the question: "How do the grandchildren of Queen Elizabeth address her in a private location?"

While the responses were varied, our own research indicates the Queen’s grandchildren have some rather affectionate nicknames for her.

William and Harry famously cheered on their grandmother in her unexpected, show-stopping role in the the 2012 Olympic Games opening ceremony.

At the sight of their grandmother starring alongside Daniel Craig as James Bond, the pair squealed “Go, Granny!” in unison.

But this reportedly isn’t the only name used by the princes.

High society gossip columnist Richard Kay wrote in the Daily Mail that once after a fall at Buckingham Palace, a young William called out for “Gary.”

Britain's Queen Elizabeth II (PA)

When the household asked "Who is Gary?" the Queen reportedly responded “I’m Gary” and swooped in to comfort him.

Wills had not yet mastered "Granny," she explained.

Three-year-old great-grandson Prince George also has an endearing name for Queen Elizabeth II, as revealed in an ITV interview aired last summer to mark the monarch’s 90th birthday.

According to The Duchess of Cambridge Kate Middleton, George "calls her ‘Gan Gan.’”

However, this isn't just a cute nickname, according to PopSugar — rather it marks a long-standing royal tradition. American biographer Kitty Kelley claims that 'Gan Gan' was adopted by Prince Charles, William, and Harry to address their respective great-grandmothers.

This post was inspired by a question on Quora.

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