You're welcome. Maybe we can solve that last mystery as well.
Here are a few other screenshots, hopefully they'll help getting rid of the wrong information:
If the wrong name is connected to the the iCloud account, go to Settings - iCloud. Your name and email address will be visible at the top right. If the wrong name is there, tap the name:
Then, select "Edit":
Now it will be possible to write your first and last name (1), which will replace the wrong name. After entering your name, tap "Done" (2).
Here are a few other screenshots, hopefully they'll help getting rid of the wrong information:
If the wrong name is connected to the the iCloud account, go to Settings - iCloud. Your name and email address will be visible at the top right. If the wrong name is there, tap the name:
Then, select "Edit":
Now it will be possible to write your first and last name (1), which will replace the wrong name. After entering your name, tap "Done" (2).