A Swedish couple has run into trouble with authorities for trying to name their baby Metallica.

Michael and Karolina Tomaro are locked in a court battle with the country's National Tax Authority about naming their daughter after the rock band...

Under Swedish law, both first names and surnames need to win the approval of authorities before they can be used. Offensive, unsuitable or inappropriate names, as well as those that could "cause discomfort for the one using it" cannot be used...

The name Brfxxccxxmnpcccclllmmnprxvclmnckssqlbb11116 - pronounced Albin - was also rejected by authorities in 1996. The boy's parents had chosen the name as a protest against Swedish naming laws.

But, the name Google managed to pass muster in 2005, when Oliver Google Kai was named by his parents, search engine expert Kelias Kai and his wife Carol.