Elon Musk and his wife Grimes (real name Claire Boucher) set the pace by naming their firstborn X Æ A-12.
Turns out that didn't make it past the authorities as it featured numbers and non-English characters. So now the baby boy is called X AE-XII, which - despite meaning unknown variable, artificial intelligence - is apparently pronounced “Kyle”. Who would have guessed?
But they are by no means the first famous parents to conjure up a weird baby name...
Celebrities landing their kids with unconventional names really became a thing in the late 1960s and early 70s, when the maverick musician Frank Zappa named his daughter Moon Unit, now known as Moon. Zappa had two more children. His firstborn son Ian Donald Calvin Euclid Zappa preferred his nickname Dweezil so much he made it his official name. His younger sister was named Diva Muffin - not a nickname.
Then there was David Bowie and first wife Angie, whose son Zowie Bowie is a film producer now known as Duncan Jones. But his parents gave him that choice, as they named him Duncan Zowie Haywood Jones. What foresight.
Michael Jackson, a world leader in weirdness, may have run out of ideas when naming his sons, Prince Michael and Prince Michael II, but his brother Jermaine definitely came out on top naming his son Jermajesty.
More recently, Jay-Z and Beyoncé’s first child Blue Ivy was joined by twins Rumi and Sir. Meanwhile, Kim Kardashian and Kanye West named their kids Psalm, Chicago, Saint and North, but actor Forest Whitaker was first to get into that groove, naming his kids Ocean, Autumn, Sonnet and True.
The children of Alicia Keys and record producer Swizz Beatz got a biblical theme: Egypt and Genesis.