Decision on citizenship declaration may contain your former name
If you are a former Finnish citizen and your name has changed, you might still get a decision that contains your old name. This is because the Finnish Immigration Service issues the decisions based on the name that has been entered for you in the Finnish Population Information System.
The name that is shown in your national passport or is based on other documentary evidence will be in brackets after the name that has been obtained from the Population Information System. The Finnish Immigration Service does not have the right to decide on the applicant’s official name; that responsibility belongs to the Digital and Population Data Services Agency.
If your personal information has changed, you can ask your nearest Finnish embassy or consulate or the Digital and Population Data Services Agency to update your information. Further information for expatriate Finns is available on the website of the Digital and Population Data Services Agency (dvv.fi).