How to delete email address on keyboard

Hi there, agra13.

Thanks for reaching out to Apple Support Communities. We understand you're wanting to remove the email addresses that show on your keyboard. Do you notice this happening when using a specific application or when trying to sign into a website account? Also, are the email addresses that are being suggested your personal emails or email addresses of a contact you have saved on your device?

If the information that shows is your personal information, you can disabled this in your iPhone settings by going into Safari > AutoFill > Switch off "Use Contact Info" and this should stop Safari from prompting to fill websites with your personal contact information.

Let us know if this helps.