Log in to your PayPal account
Go to Settings
Select your profile or account information
Find the name or business name section
Click Edit
Enter the new name you want to use
Submit the required documents if PayPal asks for verification
Save the changes
If you cannot edit the name yourself, contact PayPal Support
If you mean the email address used to log in, add a new email in Settings, confirm it, and set it as primary
If you mean the display name, update it in your profile settings if the option is available