The couple made waves earlier this month when they revealed they had named their baby X Æ A-12, pronounced "X Ash A Twelve." But in an Instagram post on Sunday, Grimes said the baby’s name is now X Æ A-Xii — a tweak to comply with what their home state permits on a birth certificate.
“Did you change the baby name because of Californian laws ? What is the baby’s new name?” someone asked in the comments.
“X Æ A-Xii," Grimes replied without expounding on the reason for the alteration.
"Nice! Just removed the numbers to confirm to California law," someone else wrote.
"Roman numerals. Looks better tbh," responded Grimes, whose birth name is Claire Boucher.
People were left scratching their heads when the singer and the Tesla founder first announced the baby’s name.
The name appears to have run into some legal issues, however — hence the latest adjustment.
"A name like 'X Æ A-12' would not be allowed," Matt Conens, a spokesman for the Office of Public Affairs of the California Department of Public Health, wrote in an email to USA TODAY. "Vital records must be completed with the 26 alphabetical characters of the English language and appropriate punctuation such as hyphens, apostrophes, periods and commas."