Pippa and Kate Middleton went by the nicknames 'Pip' and 'Squeak' at school

We know quite a bit about Duchess Kate. She secretly would love to be a farmer, she wants to raise her two children 'her way,' she carries a clutch for a very specific reason and her go-to dish to cook is curry. And yes, we know her real name is Catherine.

SEE ALSO: The queen rode the train on Monday

With that said, we never knew this. The Duchess of Cambridge supposedly went by the nickname "Squeak" in school. Random, right? Well, once you hear her sister, Pippa's, nickname, it may make a bit more sense.

PHOTOS: Kate and Pippa at Pippa's wedding

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See Kate and Pippa Middleton together at Pippa's wedding
ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton and Catherine, Duchess of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD, ENGLAND - MAY 20: Catherine, Duchess of Cambridge, right, arranges the train of her sister of her sister Pippa Middleton as she arrives with her father Michael Middleton for her wedding to James Matthews at St Mark's Churchon May 20, 2017 in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge is to marry hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte are in the wedding party, along with sister Kate and princes Harry and William. (Photo by Kirsty Wigglesworth - Pool/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton and James Matthews smile as they are joined by Catherine, Duchess of Cambridge, right, after their wedding at St Mark's Church onMay 20, 2017 in Englefield, England(Photo by Arthur Edwards - WPA Pool/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge attends the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge attends the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Michael Middleton, Pippa Middleton and Catherine, Duchess of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton, James Matthews and Catherine, Duchess of Cambridge leave after getting married at the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
ENGLEFIELD, ENGLAND - MAY 20: Pippa Middleton and James Matthews smile after their wedding at St Mark's Church on May 20, 2017 in in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge married hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte was in the wedding party, along with sister Kate and princes Harry and William. (Photo by Kirsty Wigglesworth - Pool/Getty Images)
ENGLEFIELD, ENGLAND - MAY 20: Catherine, Duchess of Cambridge, right, walks with the flower boys and girls, including Prince George, second right, and Princess Charlotte after the wedding of Pippa Middleton and James Matthews at St Mark's Church ion May 20, 2017 in in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge married hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte was in the wedding party, along with sister Kate and princes Harry and William. (Photo by Kirsty Wigglesworth - Pool/Getty Images)
ENGLEFIELD, ENGLAND - MAY 20: Pippa Middleton and James Matthews smile after their wedding at St Mark's Church on May 20, 2017 in in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge married hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte was in the wedding party, along with sister Kate and princes Harry and William. (AP Photo/Kirsty Wigglesworth, Pool)
Britain's Catherine, Duchess of Cambridge (R) stands with her children Britain's prince George (L) and Britain's princess Charlotte (2R), following the wedding of her sister Pippa Middleton to James Matthews at St Mark's Church in Englefield, west of London, on May 20, 2017. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. Middleton married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, as she wore a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Pippa Middleton (L) and her new husband James Matthews leave St Mark's Church in Englefield, west of London, on May 20, 2017 following their wedding ceremony. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. The 33-year-old married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, wearing a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Pippa Middleton (R) kisses her new husband James Matthews, following their wedding ceremony at St Mark's Church in Englefield, west of London, on May 20, 2017. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. The 33-year-old married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, wearing a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge stands with her daughter Princess Charlotte of Cambridge, a bridesmaid, following the wedding of her sister Pippa Middleton to James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Justin Tallis - WPA Pool)
Pippa Middleton and her new husband James Matthews leave St Mark's Church in Englefield, west of London, on May 20, 2017 following their wedding ceremony. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. Middleton, married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, as she wore a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL AND AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
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Apparently, the names come from the school's pet guinea pigs.

"There was one called 'Pip' and one called 'Squeak,'" the royal mom revealed to students at her old school, St Andrews, in Pangbourne, Berkshire. "So my sister was called 'Pip' and I was 'Squeak.'" Okay, so it's still random, but a little less so, right?

The Duchess of Cambridge apparently shed that moniker when she went to university and started being called "Kate."

The rest of the royal family isn't without their fair share of nicknames (Her Majesty, specifically). Prince George adorably calls Queen Elizabeth II "Gan-Gan," and judging by the 2006 film "The Queen," starring Helen Mirren, Prince Philip calls his wife "Cabbage."

We'd love to hear the story behind that one.

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Catherine, Duchess Of Cambridge With Her Dog Lupo At The Tusk Charity Polo Match At Beaufort Polo Club Near Tetbury. (Photo by Mark Cuthbert/UK Press via Getty Images)
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