A French couple have been told to find another name for their baby after a court ruled they could not use the name they wanted because it contains a tilde, or an “ñ”, reports The Telegraph.
The French language does not use the tilde, but the couple from Brittany had picked a traditional and fairly obscure name from the Breton language - Fañch.
That displeased a court in the Breton port town of Quimper, which told Jean-Christophe Bernard and his wife that they would have to find an alternative.
"The principle according to which babies' names are chosen by their mothers and fathers must have limits when it comes to using a spelling which includes a character unrecognised by the French language," the court said in its judgment.
Officials in Quimper had initially refused to write Fañch on the baby's birth certificate, before changing their minds a few days later.
Born in May, the baby already has an identity card and passport with the tilde on it.
His furious father said the battle was not over.
"He will have his tilde, that's for sure," Mr Bernard said, vowing to keep fighting in the courts.
"When? We don't know. We'll see with a lawyer and with the town hall what we can do."
The ruling also sparked some anger from Breton traditionalists, who saw it as an affront to their right to freely use their ancient Celtic language which is most closely related to Welsh.