How to change page title as it's miss-spelt surname?

How to edit the the page name in Backlight 4 as it’s a miss-spelt surname?

I believe the page title on single image pages comes from the image Title metadata field.

If you’re publishing from Lightroom, edit the image metadata and republish.

If you’re using Backlight Publisher, you can try changing the image title, export it from whatever image editor you’re using and reuploading. You may need to delete the existing image and upload the new one.