The Norwegian 38-year-old political mass-killer has changed his name to Fjotolf Hansen, according to his lawyer, who also said Breivik had told him the reasons for the change but the lawyer didn't want to tell them.
Hansen is a common last name. Around 1% of Norwegians are Hansens.
Fjotolf is a name carried by only around 4 people, so most Norwegians have never heard of the name. The internet is guessing. "Fjott" translates as "dork," and people have said the "olf" might refer to "Adolph" due to the sound.