Yesterday, it was widely rumoured that Kylie Jenner might have already decided on a name for her baby girl with boyfriend, rapper Travis Scott.

Following the release of her pregnancy video and the matching tattoos that she and Travis got last year, it didn't take long for fans to take to social media to speculate the 20-year-old new mother might have called her daughter 'Butterfly.'

preview for Here's why fans think Kylie Jenner named her baby "Butterfly"

However, while a first name is yet to be confirmed by Jenner (and while we've all been speculating that the surname is highly unlikely to be Scott's for this reason), it looks like the star's 'momager' might have let slip on the baby's name last week.

Oh, and it totally fans the 'Butterfly' theory.

Kris Jenner | ELLE UKpinterest
Getty Images

On the day of Kylie's daughter's birth, 1 February, Kris Jenner posted a photograph of Kylie's new lip shade which is called 'Posie K'.

She captioned a snap of the new kits: 'So cute! One of my favorite @kyliecosmetics shades!! Posie K is launching as a limited edition trio set to celebrate the second anniversary.'

instagramView full post on Instagram

As a result, several eagle-eyed Jenner fans have pointed out that Posie could be short for Mariposa, which means 'butterfly' in Spanish.

Therefore, it's possible Kylie's baby's name is actually 'Mariposa' or 'Posie', which would further prove the 'Butterfly' name theory to be correct.

Also, isn't Kris' post's timing just that bit curious.

Come on, the same day as the birth of her granddaughter? Mysterious, right?

But wait, there's more to this story.

On 15 May 2017, Travis Scott released his hit single 'Butterfly Effect', which is almost nine months ago - the same time Kylie most likely became pregnant with her first child.

Of course, until we hear confirmation of Kylie's baby girl's name, we don't know anything for certain.

But if she is called Mariposa/Posie, we applaud the family on the ingenuity.

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Katie O'Malley
Site Director

Katie O'Malley is the Site Director on ELLE UK. On a daily basis you’ll find Katie managing all digital workflow, editing site, video and newsletter content, liaising with commercial and sales teams on new partnerships and deals (eg Nike, Tiffany & Co., Cartier etc), implementing new digital strategies and compiling in-depth data traffic, SEO and ecomm reports. In addition to appearing on the radio and on TV, as well as interviewing everyone from Oprah Winfrey to Rishi Sunak PM, Katie enjoys writing about lifestyle, culture, wellness, fitness, fashion, and more.