Canadian singer-songwriter Grimes has revealed she has made a small adjustment to her sons unusual name, due to a legal requirement in California.

Grimes and SpaceXs CEO Elon Musk welcomed their first child earlier this month, revealing they had chosen to name him X A-12 .

Perhaps understandably, the couples decision raised a fair few questions on social media, with Grimes later explaining shed chosen to name the son after X, the unknown variable, artificial intelligence and the pairs shared favourite aircraft.

However, in an Instagram comment, the Vancouver native explained they had to make a small change to the intended name.