The local pol said he usually goes by Adolf Uunona in daily life and argued it’s too late to formally change his name.

“It’s in all official documents. It’s too late for that,” he told German newspaper Bild in 2020.

For context for folks in the US, the US makes it pretty easy to change your name. Ditto for a number of other countries that derive from the British legal tradition. A number of countries have considerably more restrictive law on this point.

https://en.wikipedia.org/wiki/Name_change