Cameron Diaz and Benji Madden's incredibly unique baby name explained as actress secretly welcomes child at 53

Earlier today, Cameron Diaz candidly set the internet ablaze by revealing she's secretly welcomed a third child.

Now, fans are dying to know the inspiration behind the actress's unconventional choice of baby name.

Diaz, 53, and her rockstar husband Benji Madden broke the news on Instagram of their family's latest addition.

The couple married in an intimate ceremony at their Beverly Hills home in 2015, seven months after they met at a dinner party hosted by Diaz through Madden's twin brother, Joel, and his wife, Nicola Ritchie, who'd been friends with the Shrek star.

During their marriage, Diaz and Madden have already welcomed a daughter, Raddix, now six, and a son, Cardinal, two.

In a joint post with Diaz, the Good Charlotte musician, 47, announced the arrival of baby no. 3.

"Cameron and I are happy, excited, and feeling so BLESSED to announce the birth of our third child, Nautas Madden," he wrote. "Welcome to the world son!! We love life with our family - our kids are healthy and happy, and we are grateful!!!"

He added: "Having a blast. Sending all our best wishes - the Madden Family."

The Other Woman actress took to the comments, where she shared a series of hearts and stars emojis.

It didn't take long for fans of the celebrity couple to comment on the uniqueness of their son's name, which Madden revealed in his post comes from the Latin root word 'Nauta'.

"Congratulations - badass name," one wrote in the comments.

Another added: "Congratulations @benjaminmadden and @camerondiaz such a beautiful name."

Opting not to post an image of the infant, Madden shared a graphic explaining the meaning behind the moniker, along with a picture of a ship.

"Sailor, navigator, voyager," an accompanying explanation read. "One who embarks on a journey and fears not the unknown."

Reports allege that the couple welcomed their son through surrogacy, though neither Madden nor Diaz have publicly confirmed this.

The A-list duo have long sought privacy for their children, refusing to discuss them in interviews or share images of them online, other than on the very odd occasion.

In 2020, The Mask actress Diaz told TV host Jimmy Fallon that becoming a mother had changed her life in more ways than she'd expected.

"Every single day, there are leaps and bounds, and these things that happen - she’s not the same baby she was yesterday," she revealed of her daughter at the time. "It’s so gratifying to actually get to see that growth and to be a part of it and to help let her be her, and it’s just amazing."