Pippa Middleton and James Matthews welcomed a baby son in October but his name was kept under wraps until now.
According to The Sun, the couple has touchingly paid tribute to a number of family members - including Pippa's brother-in-law Prince William.
The name also reportedly pays tribute to James' late brother Michael, who disappeared in 1999 while attempting to climb Mount Everest aged just 22.
And if Middleton and Matthews did, in fact, choose "Michael" as a middle name, it's not surprising at all, because Matthews has been all about keeping his brother's memory alive.
The Mail first reported the news, as per the baby's birth certificate.
We know that Middleton and Matthews' baby will likely have many play dates with his older cousins but he will be bonded with the youngest of the Cambridge children in a unique way.More news: Serena Williams named GQ's 'Woman of the Year'
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Pippa Middleton and husband James Matthews have picked a very special name for their firstborn child.
The first cousin to Prince George, Princess Charlotte and Prince Louis is settling in with his proud parents since his arrival on October 15.
"The Duke and Duchess of Cambridge are thrilled for Pippa and James", Kensington Palace shared in a short statement.
A spokeswoman for Middleton and her husband said: "Everyone is delighted and mother and baby are doing well".