On Tuesday, SpaceX founder Elon Musk confirmed in a tweet that he and his girlfriend, singer Grimes, had welcomed a baby boy. After sharing the news, fans were then told that the Tesla CEO and "Genesis" musician had decided to name him X Æ A-12 Musk. However, the unique name may not be valid in the state of California due to a specific reason.

According to People, the couple may be presented with obstacles when it comes to legally giving their son the name. David Glass, a family law attorney, elaborated on why this may be and what their options are moving forward.

"In California, you can only use the '26 characters' of the English language in your baby name," he said, adding, "Thus, you can't have numbers, Roman numerals, accents, umlauts or other symbols or emojis. Although an apostrophe, for a name like 'O'Connor,' is acceptable."

Continuing, he said that even if Musk and Grimes had filled out the birth certificate at the hospital, it will likely be rejected upon submission due to the specific characters used. As a result, they may be asked to resubmit the information.

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Prior to the unexpected hurdle that the two may be presented with down the road, Grimes, whose real name is Claire Boucher, elaborated on the meaning behind X Æ A-12 in a recent tweet. According to the "Oblivion" musician, the couple had intended to represent multiple meanings in the name, including her love of artificial intelligence and their favorite aircraft. Her tweet can be seen below.

As for where they go from here when it comes to solidifying their son's name, Glass said they will have an option down the road.

"They have an opportunity to appeal the rejection of the birth certificate application but it's unlikely that it will be granted because, again, California ... has been struggling with using symbols," he concluded.

Musk and Grimes
Elon Musk and Grimes attend the Costume Institute Benefit at Metropolitan Museum of Art on May 7, 2018, in New York City. Getty Images/Taylor Hill