Superstars Jay Z and Beyonce wanted to trademark their daughter Blue Ivy's name simply to protect others from cashing in on her unique moniker.

The Crazy In Love hitmaker gave birth to the couple's first child in January, 2012, and the new parents subsequently filed legal papers in a bid to protect the rights to their baby's name amid rumours they were planning to launch products in their kid's honour.

However, their request was rejected after it was discovered that bosses at party planning firm Blue Ivy Events in Boston, Massachusetts had been operating under the title since 2009.

Now Jay Z has opened up about their failed trademark effort in a new cover story for Vanity Fair magazine, insisting they never actually planned to do anything with the copyright.

He says, "People wanted to make products based on our child's name and you don't want anybody trying to benefit off your baby's name. It wasn't for us to do anything; as you see, we haven't done anything."