bestofwikipedia:

Brfxxccxxmnpcccclllmmnprxvclmnckssqlbb11116 was a name intended for a Swedish child who was born in 1991. Parents Elisabeth Hallin and Lasse Diding had planned to never legally name their child as a protest against the naming law of Sweden so, a district court in Halmstad, southern Sweden, fined them. Responding to the fine, the parents submitted the 43-character name in May 1996. The court rejected the name.