Elon Musk and Grimes have secretly welcomed a SECOND child via surrogate

Tesla billionaire Elon Musk and his on-again-off-again partner Grimes have secretly welcomed a second child via surrogate, a baby girl named Exa Dark Sideræl, or ‘Y’ for short, the singer has revealed. 

The 33-year-old musician spoke out about the couple’s newest arrival in an interview with Vanity Fair this week, explaining that their daughter was born in December, while opening up about the origins of her unique name. 

According to the singer, the newborn’s quirky first name, Exa, was inspired by the supercomputing term exaFLOPS, which is ‘the ability to perform 1 quintillion floating-point operations per second’, while her second name Dark, is a nod to dark matter and ‘the unknown’. 

‘People fear it but truly it’s the absence of photons. Dark matter is the beautiful mystery of our universe,’ she told the magazine. 

Finally, Sideræl, which is pronounced sigh-deer-ee-el, is a ‘more elven spelling’ of sidereal, which Grimes described as ‘the true time of the universe, star time, deep space time, not our relative earth time’.

Their daughter’s third name is also a reference to Grimes’ favorite Lord of the Rings character, the elf Galadriel.

The couple will call their baby daughter ‘Y’ for short, following the trend they started with the arrival of their first-born child, son X Æ A-12, who Grimes gave birth to in May 2020, and whom she and Elon call ‘X’.  

Surprise! Tesla billionaire Elon Musk and his on-again-off-again partner Grimes have secretly welcomed a second child, a baby girl, via surrogate, the singer revealed in a new interview 

The 33-year-old singer, who already has a baby son, X Æ A-12 (pictured) with Elon, 50, shared that the couple has named the newborn Exa Dark Sideræl, or ‘Y’ for short

Grimes’ surprise baby announcement comes less than six months after the couple reportedly split up, having been dating for three years. 

Speaking about the current status of their relationship, the singer described it as ‘fluid’, explaining that while she ‘would probably refer to [Elon] as her boyfriend’, the couple do not currently live together and each ‘have their own thing going on’. 

While the couple do not live together, Grimes relocated in December from her home in Los Angeles to a property in Austin, Texas, where she is currently residing in a ‘sleepy neighborhood cul-de-sac’ that is located ‘a short drive’ away from Tesla’s factory. 

‘I would probably refer to him as my boyfriend, but we’re very fluid,’ she said. 

‘We live in separate houses. We’re best friends. We see each other all the time…. We just have our own thing going on, and I don’t expect other people to understand it. 

‘This is the best it’s ever been…. We just need to be free.’

According to Grimes, the couple are hoping to have more children in the future – ‘at least three of four’ – and she noted that X and Y are currently splitting their time between their parents’ homes. 

At the time of her Vanity Fair interview, which took place at her new Texas home, Grimes noted that her son was spending time with his father, while she was caring for their newborn daughter.   

According to Grimes, her relationship with Elon (seen with his son), is ‘the best it’s ever been’

The singer (who is pictured with Elon and their son in May 2021) has relocated to Austin, Texas, where she is living in a ‘sleepy neighborhood cul-de-sac’ close to Tesla’s factory

As well as his two children with Grimes, billionaire SpaceX founder Elon is also father to five son with his first wife Justine, whom he divorced in 2008 after eight years of marriage. 

The former couple share twins Griffin and Xavier, born in 2004, and triplets Kai, Saxon and Damian, born in 2006. They also welcomed a baby boy named Nevada in 2002, but the newborn tragically died of sudden infant death syndrome in 2002. 

Following his split from Justine, Elon went on to wed British actress Talulah Riley in 2010.