Elon Musk shares rare family post as he and girlfriend Grimes pose with their toddler son X Æ A-XII

Elon Musk gave fans a rare glimpse of his family life on Monday, when he shared a snap of himself posing with girlfriend Grimes and their 10-month-old son X Æ A-XII.

In the image, shared on Twitter, the SpaceX and Tesla CEO, 49, was seen holding his adorable offspring as the toddler appeared fixated with a colourful bunch of flowers.

Billionaire entrepreneur Elon stood beside his musician girlfriend Grimes, 32, who donned cat eye sunglasses as she looked on adoringly at the father-son interaction.

Family: Elon Musk gave fans a rare glimpse of his family life on Monday, when he shared a snap of himself posing with girlfriend Grimes and their 10-month-old son X Æ A-XII

Wearing her blonde locks in long beachy waves with a floral headpiece, the Canadian star looked relaxed and happy as she enjoyed her day in the sunshine.

Captioning the image, Elon further fuelled talk of his recently announced plans to rename a Texas town, when he simply wrote: ‘Starbase, Texas.’

According to the Houston Chronicle, his Space Exploration Technologies Corp. has hatched plans to build his deep space rocket in Boca Chica, on Texas’ Gulf Coast.

Last Tuesday, Elon tweeted: ‘Creating the city of Starbase, Texas. From thence to Mars, And hence the Stars.’

'The Second Last Kingdom': Last month, the billionaire warmed his fans' hearts by tweeting a rare snap of his toddler offspring

‘The Second Last Kingdom’: Last month, the billionaire warmed his fans’ hearts by tweeting a rare snap of his toddler offspring

It has been reported by Bloomberg that the tweet was likely in reference to possible moves to Boca Chica’s name to Starbase. 

Last month, Elon also warmed his fans’ hearts when he tweeted a snap of himself with his son, X Æ A-XII. 

In his new snapshot Elon could be seen using one hand to chat on the phone and the other arm to hold his baby, who was tugging at his shirt.

Elon, who in January passed Jeff Bezos to become the richest man in the world, cryptically captioned the post: ‘The Second Last Kingdom.’

Side by side: The tech heartthrob, who is CEO of SpaceX and Tesla, shares his child with girlfriend Grimes, whose real name is Claire Elise Boucher

Side by side: The tech heartthrob, who is CEO of SpaceX and Tesla, shares his child with girlfriend Grimes, whose real name is Claire Elise Boucher

It is unknown whether he was making a joking reference to The Last Kingdom, a BBC show based on the historical fiction novel of the same name by Bernard Cornwell.

When Grimes, real name Claire Elise Boucher, gave birth to his baby last May it was initially announced that they had named their child X Æ A-12.

However, they then discovered that the California constitution only allows legal names to contain characters from the English alphabet.

As a result they eventually changed the name to X Æ A-XII, replacing the Hindu-Arabic numerals ’12’ with Roman numerals signifying the same number.

Say his name: Shortly after the baby was born he went on The Joe Rogan Experience and shared that his newest son's name is verbally said, 'X Ash A Twelve'

Say his name: Shortly after the baby was born he went on The Joe Rogan Experience and shared that his newest son’s name is verbally said, ‘X Ash A Twelve’

Elon – who shares five sons with his first wife Justine Wilson and was married twice to his second wife Talulah Riley – has explained how to pronounce X Æ A-XII.

Shortly after the baby was born he went on The Joe Rogan Experience and shared that his newest son’s name is verbally said: ‘X Ash A Twelve.’

He dished that Grimes ‘came up with the name’ except for ‘A-12’ which was ‘my contribution’ and was inspired by Lockheed’s aircraft ‘Archangel-12, the precursor to the SR-71, coolest plane ever. It’s true.’ 

Elon confided: ‘It’s actually, I think it’s better being older and having a kid. I appreciate it more. Yeah, ’cause babies are awesome.’

Mother and child: He dished that Grimes 'came up with the name' except for 'A-12' which was 'my contribution' and was inspired by Lockheed's aircraft 'Archangel-12'

Mother and child: He dished that Grimes ‘came up with the name’ except for ‘A-12’ which was ‘my contribution’ and was inspired by Lockheed’s aircraft ‘Archangel-12’