It is necessary to specify a reason if a change of given name or middle name is requested. Reasoning is also required when change in surname is requested that is not linked to fathers or mothers name or a family name.
Both guardians must sign. If child is 12 years or older they also need to sign. Signature confirms that above information is correct.
Name change is only allowed once unless in special circumstances.
After name changing it would be desirable to apply for new identities, for example passport and drivers license. Registers Iceland points out that publishing new passport because of name changing requires fee.