In general, anyone can legally change their name for any reason except to commit fraud or evade the law. To make it official, you'll need a court order legally changing your name. The procedure for getting that order depends on the state and county where you live—and the cost will range from $150 to $436.
Does it cost to change a name?
When you file your name change forms, you'll have to pay the California state filing fee. The California name change cost is $435. You might also have to pay a small surcharge depending on what county you're in. If you can't afford the filing fee, you may be able to apply for a waiver.
How much does a name change cost UK?
You must apply to the Royal Courts of Justice to get an 'enrolled' deed poll using the deed poll process. It costs £42.44. You can only enrol your own name change if you're 18 or over.