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Pippa Middletons Baby Name Is Here!
Samir Hussein/Getty Images

It's been nearly a month since Kate Middleton's younger sister Pippa had her first child, a baby boy, and we finally know the name (we think...).

Per The Mail on Sunday, the child's name is reportedly Arthur Michael William Matthews (and, um, we totally called it). The paper cites the baby's birth certificate as the source. While Arthur was a royal front-runner in the name department for Middleton, 35, and her husband, James Matthews, 43, the middle name Michael actually has some sweet family significance.

The name Michael is shared with Middleton's father, as well as her husband's younger brother. Michael Matthews went missing on Mount Everest at age 23 while trying to summit the mountain as the youngest Briton to do so. And could William be a shout-out to her sister's husband, Prince William?

Whatever the case, little Arthur joins cousins George, Charlotte and Louis as the youngest member of the royal (and royal-adjacent) brood. (And we guess Meghan Markle's baby name list just shrunk by three...)

RELATED: 4 Pippa Middleton Outfits That Are So Easy to Copy

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