Swedish authorities want to keep Michael and Karolina Tomaro from naming their daughter after a heavy metal group.
The six-month-old has been baptised Metallica, but tax officials have dubbed the name "inappropriate".
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. [Link]